Complex phase separation in La0.6Ca0.4MnO3 films revealed by electron spin resonance

被引：15
|
作者：
Tovstolytkin, A. I. [1 ]
Dzyublyuk, V. V. [1 ]
Podyalovskii, D. I. [1 ]
Moya, X. [2 ]
Israel, C. [2 ]
Sanchez, D. [2 ]
Vickers, M. E. [2 ]
Mathur, N. D. [2 ]
机构：
[1] Inst Magnetism, UA-03142 Kiev, Ukraine
[2] Univ Cambridge, Dept Mat Sci, Cambridge CB2 3QZ, England
来源：
PHYSICAL REVIEW B | 2011年 / 83卷 / 18期
基金：
英国工程与自然科学研究理事会; 俄罗斯基础研究基金会;
关键词：
THIN-FILMS; LA; MAGNETORESISTANCE; RELAXATION; DYNAMICS; STRAIN; CA;
D O I：
10.1103/PhysRevB.83.184404
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have used electron spin resonance to study an epitaxial thin-film sample of the manganite La0.6Ca0.4MnO3 in which ferromagnetic and paramagnetic phases were previously shown to coexist [Phys. Rev. B 78, 054409 (2008)]. Resonant absorbtions arise on either side of the paramagnetic resonance and reveal that the ferromagnetic phase is itself phase separated into regions with Curie temperatures of similar to 190 and similar to 250 K. This extra complexity is attributed to the coexistence of strained and relaxed regions, as verified by x-ray diffraction.
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页数：6
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