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Inhomogeneous Magnetic Structures of La0.7Ca0.3MnO3 Investigated by ESR and Magnetization Measurements

Published online by Cambridge University Press:  10 February 2011

Keon Woo Joh ,
Chang Hoon Lee ,
Cheol Eui Lee ,
Yoon Hee Jeong ,
C. S. Hong  and
Nam Hwi Hur
Keon Woo Joh
Affiliation:
Department of Physics, Korea University, Seoul 136-701, Korea
Chang Hoon Lee
Affiliation:
Department of Physics, Korea University, Seoul 136-701, Korea
Cheol Eui Lee
Affiliation:
Department of Physics, Korea University, Seoul 136-701, Korea
Yoon Hee Jeong
Affiliation:
Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
C. S. Hong
Affiliation:
Korea Research Institute of Standards and Science, Taejon 305-600, Korea
Nam Hwi Hur
Affiliation:
Korea Research Institute of Standards and Science, Taejon 305-600, Korea
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Abstract

Comprehensive measurements of electron spin resonance and magnetization of La0.7Ca0.3MnO3 in the ferromagnetic as well as paramagnetic phases were carried out. From the quantitative analysis of the ESR signal, attributed to itinerant spins and localized spins in the bottleneck regime, evidences for the inhomogeneous nature of both phases, consisting of clusters of one phase embedded in the other, were found. It is suggested that the microscopic local magnetic structures above and below Tc are qualitatively similar except that the phase below Tc carries long range order.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 602: Symposium JJ – Magnetoresistive Oxides & Related Materials , 1999 , 159
Copyright
Copyright © Materials Research Society 2000

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