Linear positive magnetoresistance and quantum interference in ferromagnetic metals

被引:40
作者
Gerber, A. [1 ]
Kishon, I.
Korenblit, I. Ya.
Riss, O.
Segal, A.
Karpovski, M.
Raquet, B.
机构
[1] Tel Aviv Univ, Sch Phys & Astron, Raymond & Beverly Sackler Fac Exact Sci, IL-69978 Tel Aviv, Israel
[2] Lab Natl Champs Magnet Pulses, F-31400 Toulouse, France
关键词
D O I
10.1103/PhysRevLett.99.027201
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Positive, linear in field, and isotropic magnetoresistance in fields up to 60 T is found in geometrically constrained ferromagnets, such as thin films of iron, nickel, and cobalt and their granular mixtures with nonmagnetic materials. The resistivity measured as a function of temperature shows a minimum at temperatures reaching a remarkably high 92 K, followed by logarithmic dependence at low temperatures. We propose to explain both phenomena by a modified version of the quantum electron-electron interaction theory. The agreement is only qualitative while the observed magnitude of the magnetoresistance slope is much larger than the calculated one.
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页数:4
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