Influence of palladium on the unidirectional anisotropy field in NiMn disordered systems
Identifieur interne : 000448 ( France/Analysis ); précédent : 000447; suivant : 000449Influence of palladium on the unidirectional anisotropy field in NiMn disordered systems
Auteurs : S. Hadjoudj [France] ; S. Senoussi [France] ; M. F. Mosbah [Algérie] ; Y. Oner [Turquie]Source :
- Journal of magnetism and magnetic materials [ 0304-8853 ] ; 1997.
Descripteurs français
- Pascal (Inist)
- Etude expérimentale, Susceptibilité magnétique, Hystérésis magnétique, Effet concentration, Dépendance température, Point Curie, Aimantation, Force coercitive, Matériau dopé, Addition palladium, Système désordonné, Anisotropie magnétique, Nickel alliage, Manganèse alliage, Alliage binaire, 7530G, 7560, Alliage MnNi:Pd, Mn Ni.
English descriptors
- KwdEn :
Abstract
Copyright (c) 1997 Elsevier Science B.V. All rights reserved. We have carried out AC susceptibility, hysteresis cycle and torque measurements on (Ni76-xPdx)Mn24, with 0≤x≤5, bulk alloys in the temperature and field ranges of 4.2-260 K and 0-20 kG, respectively. The AC susceptibility curves, χ′(T), present a maximum at the same freezing temperature, Tg, as the isoelectronic alloy Ni76Mn24. These alloys exhibit also the same Curie temperature, Tc, and the same saturated magnetization, Ms. However, both the unidirectional anisotropy field, Ha, and the coercivity field, Hc, increase considerably with the palladium content. For instance, Ha is 1.5 times larger for (Ni74Pd2)Mn24 than for Ni76Mn24. The torque measurements give approximately the same Ha at 4.2 K as the hysteresis cycle. We conclude that Pd impurities enhance unidirectional anisotropy but have practically no effect on Tc, Tg and Ms. This is ascribed to the greater spin-orbit coupling of palladium.
Affiliations:
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Pascal:98-0046144Le document en format XML
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Hadjoudj</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Laboratoire de Physique des Solides, Universite Paris-Sud, Associe au CNRS (URA 0002), Bat 510-91405</s1><s2>Orsay Cedex</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>Orsay Cedex</wicri:noRegion><placeName><region type="region" nuts="2">Île-de-France</region></placeName><orgName type="university">Université Paris-Sud</orgName></affiliation></author><author><name sortKey="Senoussi, S" sort="Senoussi, S" uniqKey="Senoussi S" first="S." last="Senoussi">S. Senoussi</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Laboratoire de Physique des Solides, Universite Paris-Sud, Associe au CNRS (URA 0002), Bat 510-91405</s1><s2>Orsay Cedex</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>Orsay Cedex</wicri:noRegion><placeName><region type="region" nuts="2">Île-de-France</region></placeName><orgName type="university">Université Paris-Sud</orgName></affiliation></author><author><name sortKey="Mosbah, M F" sort="Mosbah, M F" uniqKey="Mosbah M" first="M. F." last="Mosbah">M. F. Mosbah</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institut de Physique, Université de Constantine</s1><s2>Route d'Ain el Bey, 25000</s2><s3>DZA</s3><sZ>3 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Route d'Ain el Bey, 25000</wicri:noRegion></affiliation></author><author><name sortKey="Oner, Y" sort="Oner, Y" uniqKey="Oner Y" first="Y." last="Oner">Y. Oner</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Physics, Faculty of Science and Letters, Istanbul Technical University, 80626, Maslak</s1><s2>Istanbul</s2><s3>TUR</s3><sZ>4 aut.</sZ></inist:fA14><country>Turquie</country><wicri:noRegion>Istanbul</wicri:noRegion></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>Binary alloys</term><term>Coercive force</term><term>Curie point</term><term>Disordered systems</term><term>Doped materials</term><term>Experimental study</term><term>Magnetic anisotropy</term><term>Magnetic hysteresis</term><term>Magnetic susceptibility</term><term>Magnetization</term><term>Manganese alloys</term><term>Nickel alloys</term><term>Palladium additions</term><term>Quantity ratio</term><term>Temperature dependence</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Etude expérimentale</term><term>Susceptibilité magnétique</term><term>Hystérésis magnétique</term><term>Effet concentration</term><term>Dépendance température</term><term>Point Curie</term><term>Aimantation</term><term>Force coercitive</term><term>Matériau dopé</term><term>Addition palladium</term><term>Système désordonné</term><term>Anisotropie magnétique</term><term>Nickel alliage</term><term>Manganèse alliage</term><term>Alliage binaire</term><term>7530G</term><term>7560</term><term>Alliage MnNi:Pd</term><term>Mn Ni</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Copyright (c) 1997 Elsevier Science B.V. All rights reserved. We have carried out AC susceptibility, hysteresis cycle and torque measurements on (Ni<sub>76-x</sub>Pd<sub>x</sub>)Mn<sub>24</sub>, with 0≤x≤5, bulk alloys in the temperature and field ranges of 4.2-260 K and 0-20 kG, respectively. The AC susceptibility curves, χ′(T), present a maximum at the same freezing temperature, T<sub>g</sub>, as the isoelectronic alloy Ni<sub>76</sub>Mn<sub>24</sub>. These alloys exhibit also the same Curie temperature, T<sub>c</sub>, and the same saturated magnetization, M<sub>s</sub>. However, both the unidirectional anisotropy field, H<sub>a</sub>, and the coercivity field, H<sub>c</sub>, increase considerably with the palladium content. For instance, H<sub>a</sub> is 1.5 times larger for (Ni<sub>74</sub>Pd<sub>2</sub>)Mn<sub>24</sub> than for Ni<sub>76</sub>Mn<sub>24</sub>. The torque measurements give approximately the same H<sub>a</sub> at 4.2 K as the hysteresis cycle. We conclude that Pd impurities enhance unidirectional anisotropy but have practically no effect on T<sub>c</sub>, T<sub>g</sub> and M<sub>s</sub>. This is ascribed to the greater spin-orbit coupling of palladium.</div></front></TEI><affiliations><list><country><li>Algérie</li><li>France</li><li>Turquie</li></country><region><li>Île-de-France</li></region><orgName><li>Université Paris-Sud</li></orgName></list><tree><country name="France"><region name="Île-de-France"><name sortKey="Hadjoudj, S" sort="Hadjoudj, S" uniqKey="Hadjoudj S" first="S." last="Hadjoudj">S. Hadjoudj</name></region><name sortKey="Senoussi, S" sort="Senoussi, S" uniqKey="Senoussi S" first="S." last="Senoussi">S. Senoussi</name></country><country name="Algérie"><noRegion><name sortKey="Mosbah, M F" sort="Mosbah, M F" uniqKey="Mosbah M" first="M. F." last="Mosbah">M. F. Mosbah</name></noRegion></country><country name="Turquie"><noRegion><name sortKey="Oner, Y" sort="Oner, Y" uniqKey="Oner Y" first="Y." last="Oner">Y. 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