Anomalous magnetization in the layered itinerant ferromagnet LaCoAsO
Anomalous magnetization in the layered itinerant ferromagnet LaCoAsO
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DOI：
10.1103/physrevb.79.184407
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发表时间：
2009-05
影响因子：
3.7
通讯作者：
H. Ohta;K. Yoshimura
中科院分区：
文献类型：
--
作者：
H. Ohta;K. Yoshimura
我们合成了具有层状结构的弱流动铁磁体LaCoAsO，并测量了不同温度下的等温磁化强度。对于诸如 、 、 、 等弱流动铁磁体，等温磁化强度以阿罗特图的形式在居里温度附近的宽温度范围内显示出平行线性关系，而对于 LaCoAsO 来说，磁化强度的平方显示出凸曲率，类似于 MnSi 和 。我们分析了LaCoAsO的磁化强度，并根据自洽涨落重正化理论估计了自旋涨落的几个参数。我们模拟了上面的倒易磁化率并讨论了 LaCoAsO 中自旋涨落的性质。
We synthesized weakly itinerant ferromagnet with layered structure LaCoAsO and measured the isothermal magnetizations at various temperatures. The isothermal magnetizations in a form of Arrott plot for weakly itinerant ferromagnets such as,,, andshows parallel linear relation over the wide temperature range near the Curie temperature, while for LaCoAsO the square of the magnetizationwas found to show a convex curvature against, similar to MnSi and. We analyzed the magnetization of LaCoAsO atand estimated several parameters of spin fluctuations on the basis of self-consistent renormalization theory of spin fluctuations. We simulated a reciprocal magnetic susceptibility aboveand discussed the nature of spin fluctuations in LaCoAsO.