Quantum phase transition in Fe/Cr multilayers tuned by a magnetic field

被引：17

作者：

Aliev, FG ^{[1
]}

Moshchalkov, VV ^{[1
]}

Bruynseraede, Y ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Vaste Stof Fys & Magnetisme Lab, B-3001 Louvain, Belgium

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.81.5884

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the spin dependent electron transport near the transition from a ferromagnetic into an antiferromagnetic (AFM) state. We find that in the [Fe/Cr](10) multilayers the resistivity rho(s) associated with the AFM scattering at 4 < T < 100 K varies as rho(s)(T) = rho(s)(0) - AT(alpha) with 0.5 < alpha(H) less than or equal to 2. As T --> 0 K, rho(s) saturates except for a magnetic field region near H = H-s(o), which tunes the Arn? transition down to 0 K. For temperatures upwards from 20 mK with H = H-s(o) a crossover between two linear in T dependences of rho(s) is observed, indicating a possible transition from the critical quantum to the thermal spin fluctuations around 2-3 K.

引用

页码：5884 / 5887

页数：4

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