Nanometric size effect on magnetic ordering in half-doped La0.5Ca0.5MnO3 manganite: EPR probing

M. Auslender; Cheol Eui Lee; E. Rozenberg; A. I. Shames; D. Mogilyansky; E. Sominski; A. Gedanken

doi:10.3938/jkps.57.1559

Nanometric size effect on magnetic ordering in half-doped La_0.5Ca_0.5MnO₃ manganite: EPR probing

M. Auslender, Cheol Eui Lee, E. Rozenberg, A. I. Shames, D. Mogilyansky, E. Sominski, A. Gedanken

Department of Physics

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

4 Citations (Scopus)

Abstract

Measurements of the X-band electron paramagnetic resonance and the model fittings of the linewidth and intensity versus temperature dependences were employed to probe the finite-size effect on the magnetic ordering in half-doped La_0.5Ca_0.5MnO₃ manganite. It is shown that complex mixed magnetic ordering in bulk samples, comprised of the antiferromagnetic and the charge-ordered (AFM/CO) component, together with the ferromagnetic one, appear to be unstable regarding this effect; the AFM/CO phase is suppressed in nano-samples, which agrees with the data of magnetic measurements. In addition, we have managed to show that the FM state, appearing in nano-grains, is frustrated due to (i) an AFM-like core-shell interaction and (ii) a strong spin disorder at the surfaces and core-shell transition layers.

Original language	English
Pages (from-to)	1559-1562
Number of pages	4
Journal	Journal of the Korean Physical Society
Volume	57
Issue number	61
DOIs	https://doi.org/10.3938/jkps.57.1559
Publication status	Published - 2010 Dec

Keywords

Doped manganites
Electron paramagnetic resonance
Nanotechnology

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.3938/jkps.57.1559

Cite this

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title = "Nanometric size effect on magnetic ordering in half-doped La0.5Ca0.5MnO3 manganite: EPR probing",

abstract = "Measurements of the X-band electron paramagnetic resonance and the model fittings of the linewidth and intensity versus temperature dependences were employed to probe the finite-size effect on the magnetic ordering in half-doped La0.5Ca0.5MnO3 manganite. It is shown that complex mixed magnetic ordering in bulk samples, comprised of the antiferromagnetic and the charge-ordered (AFM/CO) component, together with the ferromagnetic one, appear to be unstable regarding this effect; the AFM/CO phase is suppressed in nano-samples, which agrees with the data of magnetic measurements. In addition, we have managed to show that the FM state, appearing in nano-grains, is frustrated due to (i) an AFM-like core-shell interaction and (ii) a strong spin disorder at the surfaces and core-shell transition layers.",

keywords = "Doped manganites, Electron paramagnetic resonance, Nanotechnology",

author = "M. Auslender and Lee, {Cheol Eui} and E. Rozenberg and Shames, {A. I.} and D. Mogilyansky and E. Sominski and A. Gedanken",

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T2 - EPR probing

AU - Auslender, M.

AU - Lee, Cheol Eui

AU - Rozenberg, E.

AU - Shames, A. I.

AU - Mogilyansky, D.

AU - Sominski, E.

AU - Gedanken, A.

PY - 2010/12

Y1 - 2010/12

N2 - Measurements of the X-band electron paramagnetic resonance and the model fittings of the linewidth and intensity versus temperature dependences were employed to probe the finite-size effect on the magnetic ordering in half-doped La0.5Ca0.5MnO3 manganite. It is shown that complex mixed magnetic ordering in bulk samples, comprised of the antiferromagnetic and the charge-ordered (AFM/CO) component, together with the ferromagnetic one, appear to be unstable regarding this effect; the AFM/CO phase is suppressed in nano-samples, which agrees with the data of magnetic measurements. In addition, we have managed to show that the FM state, appearing in nano-grains, is frustrated due to (i) an AFM-like core-shell interaction and (ii) a strong spin disorder at the surfaces and core-shell transition layers.

AB - Measurements of the X-band electron paramagnetic resonance and the model fittings of the linewidth and intensity versus temperature dependences were employed to probe the finite-size effect on the magnetic ordering in half-doped La0.5Ca0.5MnO3 manganite. It is shown that complex mixed magnetic ordering in bulk samples, comprised of the antiferromagnetic and the charge-ordered (AFM/CO) component, together with the ferromagnetic one, appear to be unstable regarding this effect; the AFM/CO phase is suppressed in nano-samples, which agrees with the data of magnetic measurements. In addition, we have managed to show that the FM state, appearing in nano-grains, is frustrated due to (i) an AFM-like core-shell interaction and (ii) a strong spin disorder at the surfaces and core-shell transition layers.

KW - Doped manganites

KW - Electron paramagnetic resonance

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