CobaltMaghrebV1, PascalFrancis, Corpus, bibRecord, 000143

Interlayer exchange coupling and magnetoresistance in FM/Os/FM trilayers

Identifieur interne : 000143 ( PascalFrancis/Corpus ); précédent : 000142; suivant : 000144

Interlayer exchange coupling and magnetoresistance in FM/Os/FM trilayers

Auteurs : K. Zanat ; A. Boufelfel

Source :

Journal of physics. Condensed matter : (Print) [ 0953-8984 ] ; 2007.

RBID : Pascal:07-0451222

Descripteurs français

Pascal (Inist)
- Interaction échange, Magnétorésistance géante, Autocohérence, Phénomène transport, Epaisseur, Interface, Rugosité, Interaction RKKY, Oscillation, Multicouche, Fer alliage, Platine alliage, Osmium, Matériau ferromagnétique, Couche ultramince, Cobalt alliage, Métal transition alliage, Os.

English descriptors

KwdEn :
- Cobalt alloys, Exchange interactions, Ferromagnetic materials, Giant magnetoresistance, Interfaces, Iron alloys, Multilayers, Oscillations, Osmium, Platinum alloys, RKKY interaction, Roughness, Self consistency, Thickness, Transition element alloys, Transport processes, Ultrathin films.

Abstract

We have performed self-consistent calculations to study the interlayer exchange coupling and transport properties of FM/Os/FM trilayers (FM = Co, Fe, FeCo and FePt) as a function of the osmium spacer thickness. Our results are in a good agreement with the published experimental results. The antiferromagnetic (AF) coupling observed experimentally in trilayers where Os spacer thickness was 9-10 Å and where the ferromagnetic slabs were Fe, Co and FeCo verify very well our calculated results. For FePt/Os/FePt, we have attributed the AF coupling peak observed experimentally at a one monolayer (1 ML) Os spacer thickness to our calculated AF coupling at 1 ML in a disordered magnetic layer and, by introducing the effect of the interface roughness in our calculations, we found that the peak is shifted towards 1.5 ML. We fitted our interlayer exchange coupling (IEC) results to an Ruderman-Kittel-Kasuya-Yosida (RKKY) function to the third order to obtain the periods of oscillations and their strengths quantitatively. We have found in a Co/Os/Co trilayer that the values of the oscillation periods of the IEC are 4 and 7 ML; the latter was observed experimentally. Due to the lack of experimental data for the periods of oscillations in FeCo/Os/FeCo, Fe/Os/Fe and FePt/Os/FePt, we compared our results to another method of calculation and found good agreement. An enhancement in the giant magnetoresistance (GMR) is observed for an ordered ferromagnetic slab compared to systems with a disordered ferromagnetic slab.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

A01	`01`	`1`		`@0 0953-8984`
A02	`01`			`@0 JCOMEL`
A03		`1`		`@0 J. phys., Condens. matter : (Print)`
A05				`@2 19`
A06				`@2 38`
A08	`01`	`1`	`ENG`	`@1 Interlayer exchange coupling and magnetoresistance in FM/Os/FM trilayers`
A11	`01`	`1`		`@1 ZANAT (K.)`
A11	`02`	`1`		`@1 BOUFELFEL (A.)`
A14	`01`			`@1 Physics Laboratory at Guelma, University of Guelma, PO Box 401 @2 Guelma 24000 @3 DZA @Z 1 aut. @Z 2 aut.`
A20				`@2 386229.1-386229.14`
A21				`@1 2007`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 577E2 @5 354000162494770310`
A44				`@0 0000 @1 © 2007 INIST-CNRS. All rights reserved.`
A45				`@0 45 ref.`
A47	`01`	`1`		`@0 07-0451222`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Journal of physics. Condensed matter : (Print)`
A66	`01`			`@0 GBR`
C01	`01`		`ENG`	@0 We have performed self-consistent calculations to study the interlayer exchange coupling and transport properties of FM/Os/FM trilayers (FM = Co, Fe, FeCo and FePt) as a function of the osmium spacer thickness. Our results are in a good agreement with the published experimental results. The antiferromagnetic (AF) coupling observed experimentally in trilayers where Os spacer thickness was 9-10 Å and where the ferromagnetic slabs were Fe, Co and FeCo verify very well our calculated results. For FePt/Os/FePt, we have attributed the AF coupling peak observed experimentally at a one monolayer (1 ML) Os spacer thickness to our calculated AF coupling at 1 ML in a disordered magnetic layer and, by introducing the effect of the interface roughness in our calculations, we found that the peak is shifted towards 1.5 ML. We fitted our interlayer exchange coupling (IEC) results to an Ruderman-Kittel-Kasuya-Yosida (RKKY) function to the third order to obtain the periods of oscillations and their strengths quantitatively. We have found in a Co/Os/Co trilayer that the values of the oscillation periods of the IEC are 4 and 7 ML; the latter was observed experimentally. Due to the lack of experimental data for the periods of oscillations in FeCo/Os/FeCo, Fe/Os/Fe and FePt/Os/FePt, we compared our results to another method of calculation and found good agreement. An enhancement in the giant magnetoresistance (GMR) is observed for an ordered ferromagnetic slab compared to systems with a disordered ferromagnetic slab.
C02	`01`	`3`		`@0 001B70E47D`
C03	`01`	`3`	`FRE`	`@0 Interaction échange @5 02`
C03	`01`	`3`	`ENG`	`@0 Exchange interactions @5 02`
C03	`02`	`3`	`FRE`	`@0 Magnétorésistance géante @5 03`
C03	`02`	`3`	`ENG`	`@0 Giant magnetoresistance @5 03`
C03	`03`	`X`	`FRE`	`@0 Autocohérence @5 04`
C03	`03`	`X`	`ENG`	`@0 Self consistency @5 04`
C03	`03`	`X`	`SPA`	`@0 Autocoherencia @5 04`
C03	`04`	`3`	`FRE`	`@0 Phénomène transport @5 05`
C03	`04`	`3`	`ENG`	`@0 Transport processes @5 05`
C03	`05`	`3`	`FRE`	`@0 Epaisseur @5 06`
C03	`05`	`3`	`ENG`	`@0 Thickness @5 06`
C03	`06`	`3`	`FRE`	`@0 Interface @5 07`
C03	`06`	`3`	`ENG`	`@0 Interfaces @5 07`
C03	`07`	`3`	`FRE`	`@0 Rugosité @5 08`
C03	`07`	`3`	`ENG`	`@0 Roughness @5 08`
C03	`08`	`3`	`FRE`	`@0 Interaction RKKY @5 09`
C03	`08`	`3`	`ENG`	`@0 RKKY interaction @5 09`
C03	`09`	`3`	`FRE`	`@0 Oscillation @5 10`
C03	`09`	`3`	`ENG`	`@0 Oscillations @5 10`
C03	`10`	`3`	`FRE`	`@0 Multicouche @5 15`
C03	`10`	`3`	`ENG`	`@0 Multilayers @5 15`
C03	`11`	`3`	`FRE`	`@0 Fer alliage @5 16`
C03	`11`	`3`	`ENG`	`@0 Iron alloys @5 16`
C03	`12`	`3`	`FRE`	`@0 Platine alliage @5 17`
C03	`12`	`3`	`ENG`	`@0 Platinum alloys @5 17`
C03	`13`	`3`	`FRE`	`@0 Osmium @2 NC @5 18`
C03	`13`	`3`	`ENG`	`@0 Osmium @2 NC @5 18`
C03	`14`	`3`	`FRE`	`@0 Matériau ferromagnétique @5 19`
C03	`14`	`3`	`ENG`	`@0 Ferromagnetic materials @5 19`
C03	`15`	`3`	`FRE`	`@0 Couche ultramince @5 20`
C03	`15`	`3`	`ENG`	`@0 Ultrathin films @5 20`
C03	`16`	`3`	`FRE`	`@0 Cobalt alliage @5 21`
C03	`16`	`3`	`ENG`	`@0 Cobalt alloys @5 21`
C03	`17`	`3`	`FRE`	`@0 Métal transition alliage @5 48`
C03	`17`	`3`	`ENG`	`@0 Transition element alloys @5 48`
C03	`18`	`3`	`FRE`	`@0 Os @4 INC @5 52`
N21				`@1 295`

Format Inist (serveur)

NO :	PASCAL 07-0451222 INIST
ET :	Interlayer exchange coupling and magnetoresistance in FM/Os/FM trilayers
AU :	ZANAT (K.); BOUFELFEL (A.)
AF :	Physics Laboratory at Guelma, University of Guelma, PO Box 401/Guelma 24000/Algérie (1 aut., 2 aut.)
DT :	Publication en série; Niveau analytique
SO :	Journal of physics. Condensed matter : (Print); ISSN 0953-8984; Coden JCOMEL; Royaume-Uni; Da. 2007; Vol. 19; No. 38; 386229.1-386229.14; Bibl. 45 ref.
LA :	Anglais
EA :	We have performed self-consistent calculations to study the interlayer exchange coupling and transport properties of FM/Os/FM trilayers (FM = Co, Fe, FeCo and FePt) as a function of the osmium spacer thickness. Our results are in a good agreement with the published experimental results. The antiferromagnetic (AF) coupling observed experimentally in trilayers where Os spacer thickness was 9-10 Å and where the ferromagnetic slabs were Fe, Co and FeCo verify very well our calculated results. For FePt/Os/FePt, we have attributed the AF coupling peak observed experimentally at a one monolayer (1 ML) Os spacer thickness to our calculated AF coupling at 1 ML in a disordered magnetic layer and, by introducing the effect of the interface roughness in our calculations, we found that the peak is shifted towards 1.5 ML. We fitted our interlayer exchange coupling (IEC) results to an Ruderman-Kittel-Kasuya-Yosida (RKKY) function to the third order to obtain the periods of oscillations and their strengths quantitatively. We have found in a Co/Os/Co trilayer that the values of the oscillation periods of the IEC are 4 and 7 ML; the latter was observed experimentally. Due to the lack of experimental data for the periods of oscillations in FeCo/Os/FeCo, Fe/Os/Fe and FePt/Os/FePt, we compared our results to another method of calculation and found good agreement. An enhancement in the giant magnetoresistance (GMR) is observed for an ordered ferromagnetic slab compared to systems with a disordered ferromagnetic slab.
CC :	001B70E47D
FD :	Interaction échange; Magnétorésistance géante; Autocohérence; Phénomène transport; Epaisseur; Interface; Rugosité; Interaction RKKY; Oscillation; Multicouche; Fer alliage; Platine alliage; Osmium; Matériau ferromagnétique; Couche ultramince; Cobalt alliage; Métal transition alliage; Os
ED :	Exchange interactions; Giant magnetoresistance; Self consistency; Transport processes; Thickness; Interfaces; Roughness; RKKY interaction; Oscillations; Multilayers; Iron alloys; Platinum alloys; Osmium; Ferromagnetic materials; Ultrathin films; Cobalt alloys; Transition element alloys
SD :	Autocoherencia
LO :	INIST-577E2.354000162494770310
ID :	07-0451222

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Pascal:07-0451222

Le document en format XML

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<front><div type="abstract" xml:lang="en">We have performed self-consistent calculations to study the interlayer exchange coupling and transport properties of FM/Os/FM trilayers (FM = Co, Fe, FeCo and FePt) as a function of the osmium spacer thickness. Our results are in a good agreement with the published experimental results. The antiferromagnetic (AF) coupling observed experimentally in trilayers where Os spacer thickness was 9-10 Å and where the ferromagnetic slabs were Fe, Co and FeCo verify very well our calculated results. For FePt/Os/FePt, we have attributed the AF coupling peak observed experimentally at a one monolayer (1 ML) Os spacer thickness to our calculated AF coupling at 1 ML in a disordered magnetic layer and, by introducing the effect of the interface roughness in our calculations, we found that the peak is shifted towards 1.5 ML. We fitted our interlayer exchange coupling (IEC) results to an Ruderman-Kittel-Kasuya-Yosida (RKKY) function to the third order to obtain the periods of oscillations and their strengths quantitatively. We have found in a Co/Os/Co trilayer that the values of the oscillation periods of the IEC are 4 and 7 ML; the latter was observed experimentally. Due to the lack of experimental data for the periods of oscillations in FeCo/Os/FeCo, Fe/Os/Fe and FePt/Os/FePt, we compared our results to another method of calculation and found good agreement. An enhancement in the giant magnetoresistance (GMR) is observed for an ordered ferromagnetic slab compared to systems with a disordered ferromagnetic slab.</div>
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<fA14 i1="01"><s1>Physics Laboratory at Guelma, University of Guelma, PO Box 401</s1>
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<fC01 i1="01" l="ENG"><s0>We have performed self-consistent calculations to study the interlayer exchange coupling and transport properties of FM/Os/FM trilayers (FM = Co, Fe, FeCo and FePt) as a function of the osmium spacer thickness. Our results are in a good agreement with the published experimental results. The antiferromagnetic (AF) coupling observed experimentally in trilayers where Os spacer thickness was 9-10 Å and where the ferromagnetic slabs were Fe, Co and FeCo verify very well our calculated results. For FePt/Os/FePt, we have attributed the AF coupling peak observed experimentally at a one monolayer (1 ML) Os spacer thickness to our calculated AF coupling at 1 ML in a disordered magnetic layer and, by introducing the effect of the interface roughness in our calculations, we found that the peak is shifted towards 1.5 ML. We fitted our interlayer exchange coupling (IEC) results to an Ruderman-Kittel-Kasuya-Yosida (RKKY) function to the third order to obtain the periods of oscillations and their strengths quantitatively. We have found in a Co/Os/Co trilayer that the values of the oscillation periods of the IEC are 4 and 7 ML; the latter was observed experimentally. Due to the lack of experimental data for the periods of oscillations in FeCo/Os/FeCo, Fe/Os/Fe and FePt/Os/FePt, we compared our results to another method of calculation and found good agreement. An enhancement in the giant magnetoresistance (GMR) is observed for an ordered ferromagnetic slab compared to systems with a disordered ferromagnetic slab.</s0>
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<s5>03</s5>
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<s5>04</s5>
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<s5>05</s5>
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<s5>05</s5>
</fC03>
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<s5>06</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Thickness</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Interface</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>Interfaces</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Rugosité</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Roughness</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Interaction RKKY</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>RKKY interaction</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Oscillation</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Oscillations</s0>
<s5>10</s5>
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<s5>15</s5>
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<fC03 i1="10" i2="3" l="ENG"><s0>Multilayers</s0>
<s5>15</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Fer alliage</s0>
<s5>16</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Iron alloys</s0>
<s5>16</s5>
</fC03>
<fC03 i1="12" i2="3" l="FRE"><s0>Platine alliage</s0>
<s5>17</s5>
</fC03>
<fC03 i1="12" i2="3" l="ENG"><s0>Platinum alloys</s0>
<s5>17</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>Osmium</s0>
<s2>NC</s2>
<s5>18</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG"><s0>Osmium</s0>
<s2>NC</s2>
<s5>18</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>Matériau ferromagnétique</s0>
<s5>19</s5>
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<fC03 i1="14" i2="3" l="ENG"><s0>Ferromagnetic materials</s0>
<s5>19</s5>
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<fC03 i1="15" i2="3" l="FRE"><s0>Couche ultramince</s0>
<s5>20</s5>
</fC03>
<fC03 i1="15" i2="3" l="ENG"><s0>Ultrathin films</s0>
<s5>20</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE"><s0>Cobalt alliage</s0>
<s5>21</s5>
</fC03>
<fC03 i1="16" i2="3" l="ENG"><s0>Cobalt alloys</s0>
<s5>21</s5>
</fC03>
<fC03 i1="17" i2="3" l="FRE"><s0>Métal transition alliage</s0>
<s5>48</s5>
</fC03>
<fC03 i1="17" i2="3" l="ENG"><s0>Transition element alloys</s0>
<s5>48</s5>
</fC03>
<fC03 i1="18" i2="3" l="FRE"><s0>Os</s0>
<s4>INC</s4>
<s5>52</s5>
</fC03>
<fN21><s1>295</s1>
</fN21>
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<server><NO>PASCAL 07-0451222 INIST</NO>
<ET>Interlayer exchange coupling and magnetoresistance in FM/Os/FM trilayers</ET>
<AU>ZANAT (K.); BOUFELFEL (A.)</AU>
<AF>Physics Laboratory at Guelma, University of Guelma, PO Box 401/Guelma 24000/Algérie (1 aut., 2 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Journal of physics. Condensed matter : (Print); ISSN 0953-8984; Coden JCOMEL; Royaume-Uni; Da. 2007; Vol. 19; No. 38; 386229.1-386229.14; Bibl. 45 ref.</SO>
<LA>Anglais</LA>
<EA>We have performed self-consistent calculations to study the interlayer exchange coupling and transport properties of FM/Os/FM trilayers (FM = Co, Fe, FeCo and FePt) as a function of the osmium spacer thickness. Our results are in a good agreement with the published experimental results. The antiferromagnetic (AF) coupling observed experimentally in trilayers where Os spacer thickness was 9-10 Å and where the ferromagnetic slabs were Fe, Co and FeCo verify very well our calculated results. For FePt/Os/FePt, we have attributed the AF coupling peak observed experimentally at a one monolayer (1 ML) Os spacer thickness to our calculated AF coupling at 1 ML in a disordered magnetic layer and, by introducing the effect of the interface roughness in our calculations, we found that the peak is shifted towards 1.5 ML. We fitted our interlayer exchange coupling (IEC) results to an Ruderman-Kittel-Kasuya-Yosida (RKKY) function to the third order to obtain the periods of oscillations and their strengths quantitatively. We have found in a Co/Os/Co trilayer that the values of the oscillation periods of the IEC are 4 and 7 ML; the latter was observed experimentally. Due to the lack of experimental data for the periods of oscillations in FeCo/Os/FeCo, Fe/Os/Fe and FePt/Os/FePt, we compared our results to another method of calculation and found good agreement. An enhancement in the giant magnetoresistance (GMR) is observed for an ordered ferromagnetic slab compared to systems with a disordered ferromagnetic slab.</EA>
<CC>001B70E47D</CC>
<FD>Interaction échange; Magnétorésistance géante; Autocohérence; Phénomène transport; Epaisseur; Interface; Rugosité; Interaction RKKY; Oscillation; Multicouche; Fer alliage; Platine alliage; Osmium; Matériau ferromagnétique; Couche ultramince; Cobalt alliage; Métal transition alliage; Os</FD>
<ED>Exchange interactions; Giant magnetoresistance; Self consistency; Transport processes; Thickness; Interfaces; Roughness; RKKY interaction; Oscillations; Multilayers; Iron alloys; Platinum alloys; Osmium; Ferromagnetic materials; Ultrathin films; Cobalt alloys; Transition element alloys</ED>
<SD>Autocoherencia</SD>
<LO>INIST-577E2.354000162494770310</LO>
<ID>07-0451222</ID>
</server>
</inist>
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Interlayer exchange coupling and magnetoresistance in FM/Os/FM trilayers

Interlayer exchange coupling and magnetoresistance in FM/Os/FM trilayers

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