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Nanometric Size Effect on Magnetic Ordering in Half-doped La0.5Ca0.5MnO3 Manganite: EPR Probing
- Authors
- Auslender, M.; Lee, Cheol Eui; Rozenberg, E.; Shames, A. I.; Mogilyansky, D.; Sominski, E.; Gedanken, A.
- Issue Date
- 12월-2010
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Doped manganites; Nanotechnology; Electron paramagnetic resonance
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.57, no.6, pp.1559 - 1562
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 57
- Number
- 6
- Start Page
- 1559
- End Page
- 1562
- ISSN
- 0374-4884
- 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.
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