Exchange bias of mu-metal thin films

Abstract

The exchange bias of the soft ferromagnet mu-metal, Ni 77 Fe 14 Cu 5 Mo 4 , with the metallic antiferromagnet Fe 50 Mn 50 has been studied as a function of ferromagnet thickness and buffer layer material. Mu-metal exhibits classic exchange bias behavior: the exchange bias (H EB ) and coercive fields scale inversely with the ferromagnet's thickness, with H EB varying as the cosine of the in-plane applied field angle. While the exchange bias, coercivity, and exchange energy are greatest when the buffer layer material is (111) oriented Cu, amorphous Ta buffers allow the mu-metal to retain more of its soft magnetic character. The ability to preserve soft ferromagnetic behavior in an exchange biased heterostructure may be useful for low field sensing and other device applications.

Controlling exchange bias in FeMn with Cu

“…8-12 X-ray diffraction measurements performed using Bruker-AXS Discover D8 diffractometer show overlap of (111) peak for all layers similarly to the results presented in Ref. 13.…”

Effect of Magnetic Field and Temperature on the Exchange Bias in Phase-Separated Nd1-xSrxCoO3(x=0.10, 0.15)

“…In 1956, Meiklejion et al found exchange bias by studying Co particle shrouded by CoO. Ever since, people have found exchange bias at FM-AFM /Ferri-FM/Ferri-AFM interfaces [1][2][3][4][5][6]. Exchange bias exists in mono-crystal and poly-crystal samples and thin film samples [7][8][9][10][11][12][13][14][15], suggesting that exchange bias is an internal trait of these systems, but not related to synthesis methods.…”