EMR study of magnetic inhomogeneities in crystalline bulk and nanometer-sized La0.7Ca0.3MnO3

A. I. Shames; E. Rozenberg; Ya M. Mukovskii; E. Sominski; A. Gedanken

doi:10.1016/j.jmmm.2008.02.051

EMR study of magnetic inhomogeneities in crystalline bulk and nanometer-sized La_0.7Ca_0.3MnO₃

A. I. Shames, E. Rozenberg, Ya M. Mukovskii, E. Sominski, A. Gedanken

Department of Chemistry

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

10 Scopus citations

Abstract

Electron magnetic resonance (EMR) was studied on crystalline bulk and nanometer-sized samples of the same La_0.7Ca_0.3MnO₃ manganite compound aiming to compare their magnetic homogeneities. The results obtained show that single-crystalline bulk sample is less homogeneous than the nanocrystalline one. Except for higher homogeneity, the nanometer-sized sample also demonstrates a weaker magnetic anisotropy. As a result, well-pronounced coexistence of different magnetic phases (coexistence of ferromagnetic and paramagnetic resonance signals) is observed in the bulk sample, while it is absent in the nanocrystalline one. 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)	e8
Journal	Journal of Magnetism and Magnetic Materials
Volume	320
Issue number	14
DOIs	https://doi.org/10.1016/j.jmmm.2008.02.051
State	Published - Jul 2008

Bibliographical note

Funding Information:
This work was supported by the Israeli Science Foundation administered by the Israel Academy of Sciences and Humanities (Grant no. 845/05).

Funding

This work was supported by the Israeli Science Foundation administered by the Israel Academy of Sciences and Humanities (Grant no. 845/05).

Funders	Funder number
Israeli Science Foundation
Israel Academy of Sciences and Humanities	845/05

Keywords

Bulk- and nanometer-sized CMR-doped manganite
Ferromagnetic and electron paramagnetic resonance

Access to Document

10.1016/j.jmmm.2008.02.051

Cite this

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title = "EMR study of magnetic inhomogeneities in crystalline bulk and nanometer-sized La0.7Ca0.3MnO3",

abstract = "Electron magnetic resonance (EMR) was studied on crystalline bulk and nanometer-sized samples of the same La0.7Ca0.3MnO3 manganite compound aiming to compare their magnetic homogeneities. The results obtained show that single-crystalline bulk sample is less homogeneous than the nanocrystalline one. Except for higher homogeneity, the nanometer-sized sample also demonstrates a weaker magnetic anisotropy. As a result, well-pronounced coexistence of different magnetic phases (coexistence of ferromagnetic and paramagnetic resonance signals) is observed in the bulk sample, while it is absent in the nanocrystalline one. It is suggested that such strong difference is directly connected to the difference in structural state of the samples.",

keywords = "Bulk- and nanometer-sized CMR-doped manganite, Ferromagnetic and electron paramagnetic resonance",

author = "Shames, {A. I.} and E. Rozenberg and Mukovskii, {Ya M.} and E. Sominski and A. Gedanken",

note = "Funding Information: This work was supported by the Israeli Science Foundation administered by the Israel Academy of Sciences and Humanities (Grant no. 845/05). ",

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T1 - EMR study of magnetic inhomogeneities in crystalline bulk and nanometer-sized La0.7Ca0.3MnO3

AU - Shames, A. I.

AU - Rozenberg, E.

AU - Mukovskii, Ya M.

AU - Sominski, E.

AU - Gedanken, A.

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N2 - Electron magnetic resonance (EMR) was studied on crystalline bulk and nanometer-sized samples of the same La0.7Ca0.3MnO3 manganite compound aiming to compare their magnetic homogeneities. The results obtained show that single-crystalline bulk sample is less homogeneous than the nanocrystalline one. Except for higher homogeneity, the nanometer-sized sample also demonstrates a weaker magnetic anisotropy. As a result, well-pronounced coexistence of different magnetic phases (coexistence of ferromagnetic and paramagnetic resonance signals) is observed in the bulk sample, while it is absent in the nanocrystalline one. It is suggested that such strong difference is directly connected to the difference in structural state of the samples.

AB - Electron magnetic resonance (EMR) was studied on crystalline bulk and nanometer-sized samples of the same La0.7Ca0.3MnO3 manganite compound aiming to compare their magnetic homogeneities. The results obtained show that single-crystalline bulk sample is less homogeneous than the nanocrystalline one. Except for higher homogeneity, the nanometer-sized sample also demonstrates a weaker magnetic anisotropy. As a result, well-pronounced coexistence of different magnetic phases (coexistence of ferromagnetic and paramagnetic resonance signals) is observed in the bulk sample, while it is absent in the nanocrystalline one. It is suggested that such strong difference is directly connected to the difference in structural state of the samples.

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