TY - JOUR
T1 - Nanometric size effect on magnetic ordering in half-doped La0.5Ca0.5MnO3 manganite
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
KW - Nanotechnology
UR - http://www.scopus.com/inward/record.url?scp=78650363231&partnerID=8YFLogxK
U2 - 10.3938/jkps.57.1559
DO - 10.3938/jkps.57.1559
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AN - SCOPUS:78650363231
SN - 0374-4884
VL - 57
SP - 1559
EP - 1562
JO - Journal of the Korean Physical Society
JF - Journal of the Korean Physical Society
IS - 61
ER -