Giant frequency dependence of dynamic freezing in nanocrystalline ferromagnetic LaCo0.5Mn0.5O3

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dc.creatorMahendiran, R.
dc.creatorBreard, Y.
dc.creatorHervieu, M.
dc.creatorRaveau, B.
dc.creatorSchiffer, P.
dc.date2003-05-28
dc.date.accessioned2026-07-07T02:51:34Z
dc.date.available2026-07-07T02:51:34Z
dc.descriptionWe have investigated the magnetic properties of nanocrystalline LaCo0.5Mn0.5O3. The temperature dependence of the imaginary part of the a.c. susceptibility shows a strongly frequency dependent maximum at a temperature, Tf, which is well below the ferromagnetic transition temperature (TC ~ 230 K). The frequency dependence of Tf obeys the Arrhenius relation, f = foexp(-Ea/kBT), with physically reasonable values of fo = 109 Hz and Ea/kB = 1518 K. The frequency shift of Tf per decade of frequency is one of the highest values observed in any magnetic system, and a similarly large value is also found in LaCo0.4Mg0.1Mn0.5O3, suggesting that such behavior is intrinsic despite the apparent presence of long range ferromagnetic order.
dc.description18 pages including 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0305653
dc.identifierhttp://arxiv.org/abs/cond-mat/0305653
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21504
dc.subjectMaterials Science
dc.titleGiant frequency dependence of dynamic freezing in nanocrystalline ferromagnetic LaCo0.5Mn0.5O3
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