Controlling the exchange interaction using the spin-flip transition of antiferromagnetic spins in Ni81Fe19/α-Fe2O3 -: art. no. 180402

被引：24

作者：

Dho, J ^{[1
]}

Leung, CW ^{[1
]}

Barber, ZH ^{[1
]}

Blamire, MG ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.71.180402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report anisotropy, coercivity, and exchange bias in ferromagnetic Ni81Fe19 layers coupled to antiferromagnetic (AF) (0001), (11(2) over bar 0), and (11(0) over bar 1)alpha-Fe2O3 layers. We show that AF spin configurations which permit spin-flop coupling give rise to a strong uniaxial anisotropy and hence a large coercivity, and that by annealing. in magnetic fields parallel to specific directions in the AF we can control either coercivity or exchange bias. In particular, we show that a reversible temperature-induced spin reorientation in the AF can be used to control the exchange interaction.

引用

页数：4

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