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Magnetic inhomogeneities in crystalline bulk and nanometer sized La0.7Ca0.3MnO3: ESR probing

Authors
Rozenberg, E.Shames, A. I.Jung, G.Mukovskii, Ya. Nt.Sominski, E.Gedanken, A.Lee, Cheol Eui
Issue Date
12월-2007
Publisher
WILEY-V C H VERLAG GMBH
Citation
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, v.244, no.12, pp.4554 - 4557
Indexed
SCIE
SCOPUS
Journal Title
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume
244
Number
12
Start Page
4554
End Page
4557
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/125667
DOI
10.1002/pssb.200777419
ISSN
0370-1972
Abstract
Electron spin resonance was studied on three (two bulk and one nanometer sized) samples of the same La0.7Ca0.3MnO3 manganite compound aiming to compare their magnetic homogeneities. The results obtained show that both ceramic and single crystalline bulk samples are less homogeneous than nanocrystalline one. Except for higher homogeneity, the nano sample demonstrates also a weaker magnetic anisotropy. As a result, well pronounced coexistence of different magnetic phases (coexistence of ferromagnetic and paramagnetic resonance signals) is observed in bulk samples, while it is absent in nano. It is suggested that such strong difference is directly connected to the difference in structural state of the samples.
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