Temperature dependence of magnetocrystalline anisotropy constants in the single variant state of L10-type FePt bulk single crystal
Temperature dependence of magnetocrystalline anisotropy constants in the single variant state of L10-type FePt bulk single crystal
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DOI：
10.1063/1.2177355
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发表时间：
2006-03-06
影响因子：
4
通讯作者：
Fukamichi, K
中科院分区：
文献类型：
--
作者：
Inoue, K;Shima, H;Fukamichi, K
研究了在压应力作用下制备的L1(0)型Fe60Pt40块体单晶的磁晶各向异性常数和单一变态下的饱和磁化强度与温度的关系。由磁化曲线计算得到的单轴磁晶各向异性常数K-u在5k时为6.9x10(7) erg cm（-3）。用Sucksmith-Thompson方法测定的5 K下二阶和四阶磁晶各向异性常数K-1和K-2分别为7.4和0.13x10(7) erg cm（-3）。K-u和K-1的值均随温度T的升高而减小，而K-2几乎与温度T无关。Callen模型与Callen模型幂律的差异是由热膨胀引起的轴比c/a的维数和热变化来描述的。(c) 2006年美国物理研究所。
The temperature dependence of magnetocrystalline anisotropy constants and the saturation magnetization in a single variant state have been investigated for L1(0)-type Fe60Pt40 bulk single crystal prepared under compressive stress. The uniaxial magnetocrystalline anisotropy constant K-u evaluated from the magnetization curve is 6.9x10(7) erg cm(-3) at 5 K. The values of the second- and fourth-order magnetocrystalline anisotropy constants K-1 and K-2 at 5 K determined by the Sucksmith-Thompson method are 7.4 and 0.13x10(7) erg cm(-3), respectively. Both the values of K-u and K-1 decrease with increasing temperature T, while K-2 is almost independent of T. The difference between the power law of the Callen and Callen model is described by the dimensionality and the thermal variation of the axial ratio c/a due to the thermal expansion. (c) 2006 American Institute of Physics.