Comparative study of giant magnetoresistance in CoZr/Cu and Co/Cu multilayers
Identifieur interne : 000202 ( Maroc/Analysis ); précédent : 000201; suivant : 000203Comparative study of giant magnetoresistance in CoZr/Cu and Co/Cu multilayers
Auteurs : K. Bouziane [France] ; J. Ben Youssef [France, Maroc] ; M. El Harfaoui [Maroc] ; O. Koshkina [France] ; H. Le Gall [France] ; J. M. Desvignes [France] ; M. El Yamani [Maroc] ; A. Fert [France]Source :
- Journal of magnetism and magnetic materials [ 0304-8853 ] ; 1997.
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Abstract
Copyright (c) 1996 Elsevier Science B.V. All rights reserved. Since amorphous Co100-xZrx alloys present ultrasoft properties, higher sensitivity is expected in CoZr/Cu multilayers compared to the Co/Cu system as investigated in the present work from two types (I and II) of hybrid magnetic structures [(F1/F2/F1)Cu15 where (F1/F2/F1) is a magnetic sandwich corresponding to either [(CoZr/Co/CoZr)15 (type I) or [(Co/CoZr/Co)Cu15 (type II) and F1 is a very thin magnetic layer inserted at the interfaces between the Cu layer and the magnetic F2-based multilayers. Strong changes in the magnetization hysteresis curve, the indirect exchange coupling J and the magnetoresistive properties are observed with the insertion of a very thin magnetic CoZr (Co) layer at the interfaces between Cu spacer layers and the magnetic Co (CoZr) layer in Co/Cu (CoZr/Cu) multilayers. Insertion of a 2 Å thick CoZr layer into interfaces of the Co/Cu type I multilayers induces significant reduction by a factor 5 of J and the magnetoresistance ΔR/R. Opposite evolution is observed when a thin Co layer is inserted in CoZr/Cu type II multilayers. The dependences of the magnetic and magnetoresistive characteristics with the insertion are correlated with the interface roughness change as deduced from XRD at low angles.
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El Yamani</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s2>BP 1014</s2><s3>MAR</s3><sZ>2 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Maroc</country><wicri:noRegion>BP 1014</wicri:noRegion></affiliation></author><author><name sortKey="Fert, A" sort="Fert, A" uniqKey="Fert A" first="A." last="Fert">A. Fert</name><affiliation wicri:level="3"><inist:fA14 i1="04"><s2>91404 Orsay</s2><s3>FRA</s3><sZ>8 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Orsay</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of magnetism and magnetic materials</title><title level="j" type="abbreviated">J. magn. magn. mater.</title><idno type="ISSN">0304-8853</idno><imprint><date when="1997">1997</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of magnetism and magnetic materials</title><title level="j" type="abbreviated">J. magn. magn. mater.</title><idno type="ISSN">0304-8853</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cobalt</term><term>Cobalt alloys</term><term>Copper</term><term>Exchange interactions</term><term>Giant magnetoresistance</term><term>Hysteresis</term><term>Magnetization</term><term>Multilayers</term><term>Thickness</term><term>XRD</term><term>Zirconium alloys</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Magnétorésistance géante</term><term>Multicouche</term><term>Aimantation</term><term>Hystérésis</term><term>Interaction échange</term><term>XRD</term><term>Epaisseur</term><term>Cobalt</term><term>Cuivre</term><term>Cobalt alliage</term><term>Zirconium alliage</term><term>7570P</term><term>Co</term><term>Cu</term><term>Alliage CoZr</term><term>Co Zr</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Cobalt</term><term>Cuivre</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Copyright (c) 1996 Elsevier Science B.V. All rights reserved. Since amorphous Co<sub>100-x</sub>Zr<sub>x</sub> alloys present ultrasoft properties, higher sensitivity is expected in CoZr/Cu multilayers compared to the Co/Cu system as investigated in the present work from two types (I and II) of hybrid magnetic structures [(F<sub>1</sub>/F<sub>2</sub>/F<sub>1</sub>)Cu<sub>15</sub> where (F<sub>1</sub>/F<sub>2</sub>/F<sub>1</sub>) is a magnetic sandwich corresponding to either [(CoZr/Co/CoZr)<sub>15</sub> (type I) or [(Co/CoZr/Co)Cu<sub>15</sub> (type II) and F<sub>1</sub> is a very thin magnetic layer inserted at the interfaces between the Cu layer and the magnetic F<sub>2</sub>-based multilayers. Strong changes in the magnetization hysteresis curve, the indirect exchange coupling J and the magnetoresistive properties are observed with the insertion of a very thin magnetic CoZr (Co) layer at the interfaces between Cu spacer layers and the magnetic Co (CoZr) layer in Co/Cu (CoZr/Cu) multilayers. Insertion of a 2 Å thick CoZr layer into interfaces of the Co/Cu type I multilayers induces significant reduction by a factor 5 of J and the magnetoresistance ΔR/R. Opposite evolution is observed when a thin Co layer is inserted in CoZr/Cu type II multilayers. The dependences of the magnetic and magnetoresistive characteristics with the insertion are correlated with the interface roughness change as deduced from XRD at low angles.</div></front></TEI><affiliations><list><country><li>France</li><li>Maroc</li></country><region><li>Île-de-France</li></region><settlement><li>Meudon-Bellevue</li><li>Orsay</li></settlement></list><tree><country name="France"><region name="Île-de-France"><name sortKey="Bouziane, K" sort="Bouziane, K" uniqKey="Bouziane K" first="K." last="Bouziane">K. Bouziane</name></region><name sortKey="Ben Youssef, J" sort="Ben Youssef, J" uniqKey="Ben Youssef J" first="J." last="Ben Youssef">J. Ben Youssef</name><name sortKey="Desvignes, J M" sort="Desvignes, J M" uniqKey="Desvignes J" first="J. M." last="Desvignes">J. M. Desvignes</name><name sortKey="Fert, A" sort="Fert, A" uniqKey="Fert A" first="A." last="Fert">A. Fert</name><name sortKey="Koshkina, O" sort="Koshkina, O" uniqKey="Koshkina O" first="O." last="Koshkina">O. Koshkina</name><name sortKey="Le Gall, H" sort="Le Gall, H" uniqKey="Le Gall H" first="H." last="Le Gall">H. Le Gall</name></country><country name="Maroc"><noRegion><name sortKey="Ben Youssef, J" sort="Ben Youssef, J" uniqKey="Ben Youssef J" first="J." last="Ben Youssef">J. Ben Youssef</name></noRegion><name sortKey="El Harfaoui, M" sort="El Harfaoui, M" uniqKey="El Harfaoui M" first="M." last="El Harfaoui">M. El Harfaoui</name><name sortKey="El Yamani, M" sort="El Yamani, M" uniqKey="El Yamani M" first="M." last="El Yamani">M. El Yamani</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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