Publication Date:
2019
Description:
〈p〉Publication date: 1 December 2019〈/p〉
〈p〉〈b〉Source:〈/b〉 Journal of Magnetism and Magnetic Materials, Volume 491〈/p〉
〈p〉Author(s): Xu Zheng, Tian Gao, Wei Jing, Xingyu Wang, Yongsheng Liu, Bin Chen, Hongliang Dong, Zhiqiang Chen, Shixun Cao, Chuanbing Cai, Vyacheslav V. Marchenkov〈/p〉
〈div xml:lang="en"〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉Magnetic properties of polycrystalline La〈sub〉1-〈/sub〉〈em〉〈sub〉x〈/sub〉〈/em〉Ca〈em〉〈sub〉x〈/sub〉〈/em〉Mn〈sub〉0.9〈/sub〉Cu〈sub〉0.1〈/sub〉O〈sub〉3〈/sub〉 (0.02 ≤ 〈em〉x〈/em〉 ≤ 0.4) have been investigated in detail. All samples show a clear ferromagnetic-paramagnetic transition. The Curie temperature 〈em〉T〈/em〉〈sub〉C〈/sub〉 decreases with increasing Ca-dopant. Inverse susceptibility of all the samples deviates from Curie-Weiss law above 〈em〉T〈/em〉〈sub〉C〈/sub〉, indicating the presence of a short range ferromagnetic and/or antiferromagnetic ordering state in the paramagnetic background. For 0.02 ≤ 〈em〉x〈/em〉 ≤ 0.2, the upward deviation is attributed to antiferromagnetic interactions, while the downward for 〈em〉x〈/em〉 ≥ 0.3 samples is caused by a Griffiths-like behavior, which is suppressed by an applied field. A charge ordering transition associated with an antiferromagnetic phase is detected in 〈em〉x〈/em〉 ≥ 0.3 samples, the melting of which results in a spin reorientation transition and a new FM phase. Finally, the phase diagrams of this manganite system have been established.〈/p〉〈/div〉
〈/div〉
Print ISSN:
0304-8853
Electronic ISSN:
1873-4766
Topics:
Physics
