Magnetic inhomogeneities in crystalline bulk and nanometer sized la 0.7Ca0.3MnO3: ESR probing

Evgeny Rosenberg; Alexander Shames; Grzegorz Jung; Ya M. Mukovskii; E. Sominski; A. Gedanken; Cheol Eui Lee

doi:10.1002/pssb.200777419

Magnetic inhomogeneities in crystalline bulk and nanometer sized la _0.7Ca_0.3MnO₃: ESR probing

Evgeny Rosenberg, Alexander Shames, Grzegorz Jung, Ya M. Mukovskii, E. Sominski, A. Gedanken, Cheol Eui Lee

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Electron spin resonance was studied on three (two bulk and one nanometer sized) samples of the same La_0.7Ca_0.3MnO₃ 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.

Original language	English
Pages (from-to)	4554-4557
Number of pages	4
Journal	Physica Status Solidi (B): Basic Research
Volume	244
Issue number	12
DOIs	https://doi.org/10.1002/pssb.200777419
State	Published - 1 Dec 2007
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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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.",

author = "Evgeny Rosenberg and Alexander Shames and Grzegorz Jung and Mukovskii, {Ya M.} and E. Sominski and A. Gedanken and Lee, {Cheol Eui}",

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T1 - Magnetic inhomogeneities in crystalline bulk and nanometer sized la 0.7Ca0.3MnO3

T2 - ESR probing

AU - Rosenberg, Evgeny

AU - Shames, Alexander

AU - Jung, Grzegorz

AU - Mukovskii, Ya M.

AU - Sominski, E.

AU - Gedanken, A.

AU - Lee, Cheol Eui

PY - 2007/12/1

Y1 - 2007/12/1

N2 - 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.

AB - 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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Magnetic inhomogeneities in crystalline bulk and nanometer sized la _0.7Ca_0.3MnO₃: ESR probing

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