Magnetic properties of Tm-Zr multilayers
Identifieur interne : 001179 ( Pascal/Curation ); précédent : 001178; suivant : 001180Magnetic properties of Tm-Zr multilayers
Auteurs : A. Baudry [France] ; P. Boyer [France] ; M. Brunel [France]Source :
- Journal of magnetism and magnetic materials [ 0304-8853 ] ; 1998.
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Abstract
A 600 Å film of thulium and Tm-Zr multilayers in which the Tm layers are separated by 30 Å non-magnetic Zr layers were evaporated on superficially oxidized silicon substrates under ultra-vacuum conditions. The thickness of the Tm layers was varied between 8 and 30 Å, X-ray diffraction gives evidence for a columnar growth along the c axis of the HCP structure. with in-plane compression of Tm layers thinner than 20 Å. The magnetic structure of the film is quite similar to that of bulk Tm. On the contrary. the c-axis modulated antiferromagnetic phase which takes place in the film at TN 54 K is not observed in the multilayers. This phenomenon is preferentially attributed to an enhancement of the ferromagnetic coupling at the edges of the thulium layers. which favours a structure close to the squared 3-4 antiphase ferromagnetic arrangement of the magnetic moments displayed by the bulk below 30 K. A marked trend to ferromagnetism is observed as the Tm layers become thinner. Contrary to that observed in Dy-Zr and Ho-Zr multilayers, the interface and volume anisotropies do not compensate each other for 8 Å Tm layers. The c-axis magnetic anisotropy of Tm is preserved whatever the thickness of the Tm layers. The estimated anisotropies are compared with the results of point-charge crystal-field calculations.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Magnetic properties of Tm-Zr multilayers</title><author><name sortKey="Baudry, A" sort="Baudry, A" uniqKey="Baudry A" first="A." last="Baudry">A. Baudry</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Département de Recherche Fondamentale sur la Matière Condensée, CEA Grenoble, 17 rue des Martyrs</s1><s2>38054 Grenoble</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Boyer, P" sort="Boyer, P" uniqKey="Boyer P" first="P." last="Boyer">P. Boyer</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Département de Recherche Fondamentale sur la Matière Condensée, CEA Grenoble, 17 rue des Martyrs</s1><s2>38054 Grenoble</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Brunel, M" sort="Brunel, M" uniqKey="Brunel M" first="M." last="Brunel">M. Brunel</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Laboratoire de Cristallogaphie, CNRS, BP 166</s1><s2>38042 Genoble</s2><s3>FRA</s3><sZ>3 aut.</sZ></inist:fA14><country>France</country></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">98-0297284</idno><date when="1998">1998</date><idno type="stanalyst">PASCAL 98-0297284 INIST</idno><idno type="RBID">Pascal:98-0297284</idno><idno type="wicri:Area/Pascal/Corpus">001179</idno><idno type="wicri:Area/Pascal/Curation">001179</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Magnetic properties of Tm-Zr multilayers</title><author><name sortKey="Baudry, A" sort="Baudry, A" uniqKey="Baudry A" first="A." last="Baudry">A. Baudry</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Département de Recherche Fondamentale sur la Matière Condensée, CEA Grenoble, 17 rue des Martyrs</s1><s2>38054 Grenoble</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Boyer, P" sort="Boyer, P" uniqKey="Boyer P" first="P." last="Boyer">P. Boyer</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Département de Recherche Fondamentale sur la Matière Condensée, CEA Grenoble, 17 rue des Martyrs</s1><s2>38054 Grenoble</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Brunel, M" sort="Brunel, M" uniqKey="Brunel M" first="M." last="Brunel">M. Brunel</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Laboratoire de Cristallogaphie, CNRS, BP 166</s1><s2>38042 Genoble</s2><s3>FRA</s3><sZ>3 aut.</sZ></inist:fA14><country>France</country></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="1998">1998</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>Experimental study</term><term>Hysteresis</term><term>Magnetic anisotropy</term><term>Magnetic structure</term><term>Magnetization</term><term>Multilayers</term><term>Thulium</term><term>Zirconium</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Etude expérimentale</term><term>Multicouche</term><term>Structure magnétique</term><term>Anisotropie magnétique</term><term>Aimantation</term><term>Hystérésis</term><term>Thulium</term><term>Zirconium</term><term>7570C</term><term>Tm</term><term>Zr</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A 600 Å film of thulium and Tm-Zr multilayers in which the Tm layers are separated by 30 Å non-magnetic Zr layers were evaporated on superficially oxidized silicon substrates under ultra-vacuum conditions. The thickness of the Tm layers was varied between 8 and 30 Å, X-ray diffraction gives evidence for a columnar growth along the c axis of the HCP structure. with in-plane compression of Tm layers thinner than 20 Å. The magnetic structure of the film is quite similar to that of bulk Tm. On the contrary. the c-axis modulated antiferromagnetic phase which takes place in the film at T<sub>N</sub> 54 K is not observed in the multilayers. This phenomenon is preferentially attributed to an enhancement of the ferromagnetic coupling at the edges of the thulium layers. which favours a structure close to the squared 3-4 antiphase ferromagnetic arrangement of the magnetic moments displayed by the bulk below 30 K. A marked trend to ferromagnetism is observed as the Tm layers become thinner. Contrary to that observed in Dy-Zr and Ho-Zr multilayers, the interface and volume anisotropies do not compensate each other for 8 Å Tm layers. The c-axis magnetic anisotropy of Tm is preserved whatever the thickness of the Tm layers. The estimated anisotropies are compared with the results of point-charge crystal-field calculations.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0304-8853</s0></fA01><fA02 i1="01"><s0>JMMMDC</s0></fA02><fA03 i2="1"><s0>J. magn. magn. mater.</s0></fA03><fA05><s2>185</s2></fA05><fA06><s2>3</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Magnetic properties of Tm-Zr multilayers</s1></fA08><fA11 i1="01" i2="1"><s1>BAUDRY (A.)</s1></fA11><fA11 i1="02" i2="1"><s1>BOYER (P.)</s1></fA11><fA11 i1="03" i2="1"><s1>BRUNEL (M.)</s1></fA11><fA14 i1="01"><s1>Département de Recherche Fondamentale sur la Matière Condensée, CEA Grenoble, 17 rue des Martyrs</s1><s2>38054 Grenoble</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></fA14><fA14 i1="02"><s1>Laboratoire de Cristallogaphie, CNRS, BP 166</s1><s2>38042 Genoble</s2><s3>FRA</s3><sZ>3 aut.</sZ></fA14><fA20><s1>309-321</s1></fA20><fA21><s1>1998</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>17230</s2><s5>354000076776450060</s5></fA43><fA44><s0>0000</s0><s1>© 1998 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>28 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>98-0297284</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i2="1"><s0>Journal of magnetism and magnetic materials</s0></fA64><fA66 i1="01"><s0>NLD</s0></fA66><fC01 i1="01" l="ENG"><s0>A 600 Å film of thulium and Tm-Zr multilayers in which the Tm layers are separated by 30 Å non-magnetic Zr layers were evaporated on superficially oxidized silicon substrates under ultra-vacuum conditions. The thickness of the Tm layers was varied between 8 and 30 Å, X-ray diffraction gives evidence for a columnar growth along the c axis of the HCP structure. with in-plane compression of Tm layers thinner than 20 Å. The magnetic structure of the film is quite similar to that of bulk Tm. On the contrary. the c-axis modulated antiferromagnetic phase which takes place in the film at T<sub>N</sub> 54 K is not observed in the multilayers. This phenomenon is preferentially attributed to an enhancement of the ferromagnetic coupling at the edges of the thulium layers. which favours a structure close to the squared 3-4 antiphase ferromagnetic arrangement of the magnetic moments displayed by the bulk below 30 K. A marked trend to ferromagnetism is observed as the Tm layers become thinner. Contrary to that observed in Dy-Zr and Ho-Zr multilayers, the interface and volume anisotropies do not compensate each other for 8 Å Tm layers. The c-axis magnetic anisotropy of Tm is preserved whatever the thickness of the Tm layers. 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