Formation of Nanosize Griffiths-like Clusters in Solid Solution of Ferromagnetic Manganite and Cobaltite
Formation of Nanosize Griffiths-like Clusters in Solid Solution of Ferromagnetic Manganite and Cobaltite
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DOI：
10.1021/jp402726f
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发表时间：
2013-08-15
影响因子：
3.7
通讯作者：
Mandal, P.
中科院分区：
文献类型：
--
作者：
Bhoi, D.;Khan, N.;Mandal, P.
我们报告的存在下，格里菲斯样相在很宽的范围内的x由于形成纳米尺寸的铁磁簇在La0.6Sr0.4Mn1-xCoxO 3，铁磁La0.6Sr0.4MnO3和La0.6Sr0.4CoO3的固溶体，从磁化强度测量。在所研究的化合物中，这一阶段的出现是由于淬灭随机分布的Co-O-Mn反铁磁键的铁磁背景。与二价碱土金属掺杂的锰氧化物相反，在La_（0.6）Sr_（0.4）Mn_（1-x）CoxO_3中的类格里菲斯相可以完全以金属态存在，高于Tc（x < 0.10）。在此基础上绘制了磁电子相图。
We report the existence of a Griffiths-like phase over a wide range of x due to the formation of nanosize ferromagnetic clusters in La0.6Sr0.4Mn1-xCoxO3, the solid solution of ferromagnetic La0.6Sr0.4MnO3 and La0.6Sr0.4CoO3, from the magnetization measurements. In the studied compound, this phase arises due to the quenching of randomly distributed Co-O-Mn antiferromagnetic bonds in the ferromagnetic background. In contrary to the divalent alkaline-earth-doped manganites, the Griffiths-like phase in La0.6Sr0.4Mn1-xCoxO3 can exist entirely in the metallic state above T-c (for x < 0.10). Based on the present study, a magnetoelectronic phase diagram is drawn.