Critical behavior and magnetocaloric effect in the multiferroic double perovskite Lu2NiMnO6
Critical behavior and magnetocaloric effect in the multiferroic double perovskite Lu2NiMnO6
复制标题
多铁性双钙钛矿Lu2NiMnO6的临界行为和磁热效应
DOI：
10.1016/j.jallcom.2018.06.001
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发表时间：
2018-09
影响因子：
6.2
通讯作者：
Wang D. H.
中科院分区：
文献类型：
--
作者：
Zhang L.;Shi T. L.;Cao J. J.;Yan S. M.;Fang Y.;Han Z. D.;Qian B.;Jiang X. F.;Wang D. H.
系统地研究了用溶胶-凝胶法合成的多铁性Lu2NiMnO6的结构、磁性、磁热效应和临界行为。该化合物为单斜晶系，空间群为P21/n，随着温度的降低，从顺磁相到铁磁相的单次磁化转变被观察到，在此转变过程中可以获得相当大的磁熵变化。此外，还利用修正的Arrott图、Kouvel-Fisher方法和基于磁转变温度附近的磁数据的临界等温线分析等技术对临界指数进行了计算。通过观察临界温度以下和以上的等温线M(H)曲线，发现得到的临界指数值与平均场模型的预测值是一致的，也可以用单一标度方程m=f±(H)来证实，其中m和h分别是重整化磁化强度和磁场。计算得到的指数与三维体系的重整化群方法计算的指数符合得很好，同时考虑了自旋之间的长程相互作用，这些相互作用衰减为J(R)∼r−(3+σ)，σ=1.325。
A systematic investigation on the structure, magnetism, magnetocaloric effect, and critical behaviors of multiferroic Lu 2 NiMnO 6 synthesized by sol-gel method are reported. This compound crystallizes in a monoclinic structure with the space group P2 1/n. Upon decreasing temperature, a single magnetic transition from paramagnetic to ferromagnetic phase has been observed, around which considerable magnetic entropy changes can be obtained. Besides, evaluation of the critical exponents are performed using various techniques, like the modified Arrott plot, Kouvel-Fisher method and critical isotherm analysis based on the magnetic data around magnetic transition temperature. The obtained critical exponent values are found to be coincided and comparable with those predicted by the mean-field model, which are also confirmed by the single scaling equation: m= f±(h), where m and h are the renormalized magnetization and field, respectively by observation of isotherm M (H) curves below and above the critical temperatures collapsing into two independent universal branches. The exponents determined in this study are in good agreement with those calculated from the renormalization group approach for a three-dimensional system coupled with the attractive long-range interactions between spins that decay as J (r)∼ r−(3+ σ) with σ= 1.325.
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影响因子：
8.6
作者：
Choudhury, D.;Mandal, P.;Sarma, D. D.
通讯作者：
Sarma, D. D.
影响因子：
3.3
作者：
Bull, CL;McMillan, PF
通讯作者：
McMillan, PF
单晶螺旋磁体 FeGe 中磁场驱动的 3D 海森堡相变
影响因子：
4
作者：
L. Xu;J. Fan;W. Sun;Y. Zhu;D. Hu;J. Liu;Y. Ji;D. Shi;Hao Yang
通讯作者：
Hao Yang
DOI：
10.1209/0295-5075/108/66004
发表时间：
2014-12
期刊：
Europhysics Letters
影响因子：
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作者：
R. Das;P. Alagarsamy;A. Srinivasan
通讯作者：
R. Das;P. Alagarsamy;A. Srinivasan
R2NiMnO6（R=Eu和Dy）双钙钛矿氧化物的磁热效应和临界行为
影响因子：
6.2
作者：
Su Lei;Zhang Xiang-Qun;Dong Qiao-Yan;Ke Ya-Jiao;Hou Kai-Yue;Liu Cheng-Shi;Cheng Zhao-Hua
通讯作者：
Cheng Zhao-Hua