Giant magnetoresistance effects in intermetallic compounds (invited)
Giant magnetoresistance effects in intermetallic compounds (invited)
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DOI：
10.1063/1.358114
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发表时间：
1994-11
影响因子：
3.2
通讯作者：
V. Sechovský;L. Havela;K. Prokeš;H. Nakotte;F. D. Boer;E. Brück
中科院分区：
文献类型：
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作者：
V. Sechovský;L. Havela;K. Prokeš;H. Nakotte;F. D. Boer;E. Brück
巨磁电阻（GMR）效应在几类大块磁性材料中被观察到。由于4f和传导电子的相对较弱的耦合，与4f矩的重新取向连接的变磁过渡的电阻变化是温和的。通过涉及d态（RhFe，RCo 2）的机制可以实现更大的GMR效应，尽管最引人注目的电阻变化与U-金属间反铁磁体中的变磁转变有关。这种现象可以解释为由于费米表面间隙（由于磁超区）和/或由于自旋相关散射与磁性多层膜类似。
Giant magnetoresistance (GMR) effects are observed in several classes of bulk magnetic materials. The resistance changes at metamagnetic transitions connected with reorientation of 4f moments are only moderate due to the relatively weak coupling of the 4f and conduction electrons. Much larger GMR effects can be achieved by mechanisms involving the d states (RhFe, RCo2), though the most spectacular resistance variations are connected with metamagnetic transitions in U‐intermetallic antiferromagnets. This phenomenon can be interpreted as due to Fermi surface gapping (due to magnetic superzones) and/or due to spin‐dependent scattering in analogy with magnetic multilayers.