Brillouin light scattering from spin waves in Co100−xCrx alloy films
Brillouin light scattering from spin waves in Co100−xCrx alloy films
复制标题
Co100−xCrx 合金薄膜中自旋波的布里渊光散射
DOI:
10.1016/s0304-8853(00)00495-9
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发表时间:
2000
影响因子:
2.7
通讯作者:
Y. Shimada
中科院分区:
文献类型:
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作者:
A. Yoshihara;H. Sato;Junichiro Mawatari;K. Yoshida;O. Kitakami;Y. Shimada
Collective spin waves in Co100−xCrxalloy films (x=0, 9.2, 15.7 and 35.2 in at%) of 300±5Å in thickness have been studied by means of Brillouin light scattering (BLS) at room temperature in magnetic fields of up to 4.0kOe. Except for the Co64.8Cr35.2film, we observed scattering from spin waves and determined the spin wave stiffness constant DB. We obtained a value of DB=(3.47±0.35)×10−9Oecm2(436±44meVÅ2) for pure Co. Although this value is in good agreement with recent BLS values, it is rather smaller than the value of 510meVÅ2obtained from neutron scattering. For the alloys, the DBvalue at x=15.7 is strongly reduced to ∼1/4 of the value at x=9.2, while the saturation magnetization decreases almost linearly as the Cr content increases. We discuss this DBbehavior in terms of the Cr segregation which takes a place for Cr contents above x∼12.
DOI:
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发表时间:
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影响因子:
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