Remarkable magnetic relaxation and metamagnetic transition in phase-separated La0.7Ca0.3Mn0.9Cu0.1O3 perovskite
Remarkable magnetic relaxation and metamagnetic transition in phase-separated La0.7Ca0.3Mn0.9Cu0.1O3 perovskite
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相分离La0.7Ca0.3Mn0.9Cu0.1O3钙钛矿中显着的磁弛豫和变磁转变
DOI：
10.1063/1.4918912
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Jincang Zhang
中科院分区：
文献类型：
--
作者：
Tian Gao;Shixun Cao;Yongsheng Liu;Tao Zhou;Zhenjie Feng;Jincang Zhang
详细研究了La0.7Ca0.3Mn0.9Cu0.1O_3相分离钙钛矿结构的磁电性能。实验结果表明，在∼-146 K处，在∼-256 K处，铜的取代抑制了La0.7Ca0.3MnO_3的铁磁性相，并诱导了电荷有序转变，观察到类似Griffiths的行为。在低温下，分析了与大驰豫速率相关的不可逆变磁相变的发生，清楚地表明了FM岛的动态相共存和演化。在磁测量的基础上，建立了磁相图，总结了相分离的动态演化过程。
The magnetic and electrical properties in phase-separated La0.7Ca0.3Mn0.9Cu0.1O3 perovskite were studied in detail. Experimental results show that the substitution of Cu at Mn-site suppresses the ferromagnetic (FM) phase of La0.7Ca0.3MnO3 matrix and induces a charge ordering transition at ∼146 K. At ∼256 K, a Griffiths-like behaviour is observed. At low temperatures, the occurrence of an irreversible metamagnetic transition associated with a large relaxation rate is analyzed, clearly indicating the dynamic phase coexistence and evolution of FM islands. A magnetic phase diagram is finally constructed based on the magnetic measurements, summarizing the dynamic evolution process of phase separation.