Mossbauer study of 1% Fe-57 doped ferromagnetic insulator La0.825Ca0.175MnO3

Pissas, M; Papavassiliou, G; Devlin, E; Simopoulos, A; Likodimos, V

dc.contributor.author	Pissas, M	en
dc.contributor.author	Papavassiliou, G	en
dc.contributor.author	Devlin, E	en
dc.contributor.author	Simopoulos, A	en
dc.contributor.author	Likodimos, V	en
dc.date.accessioned	2014-03-01T01:54:38Z
dc.date.available	2014-03-01T01:54:38Z
dc.date.issued	2005	en
dc.identifier.issn	1434-6028	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/27450
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	COLOSSAL MAGNETORESISTANCE	en
dc.subject.other	HYPERFINE INTERACTIONS	en
dc.subject.other	MAGNETIC ORDER	en
dc.subject.other	MANGANITES	en
dc.subject.other	RESONANCE	en
dc.subject.other	LA0.75CA0.25MNO3	en
dc.subject.other	LA0.8CA0.2MNO3	en
dc.subject.other	SPECTROSCOPY	en
dc.subject.other	TRANSITION	en
dc.subject.other	TRANSPORT	en
dc.title	Mossbauer study of 1% Fe-57 doped ferromagnetic insulator La0.825Ca0.175MnO3	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	We have employed magnetization measurements, Mossbauer and ESR spectroscopic techniques, in order to study the ferromagnetic insulating (FMI) compound La1-xCaxMnO3 (x=0.175) doped with 1% Fe-57. We have used two samples; one prepared in air which has cation vacancies and a second in inert atmosphere, which is stoichiometric. An abrupt change of the experimental results is obtained, by all techniques, in the ferromagnetic insulating regime, in the temperature region of T(O/O//)approximate to 60 K, where an orbital rearrangement is suggested to occur. An analysis of these findings points to an orbital rearrangement transformation. Ferromagnetic resonance reveals considerable differences between stoichiometric and cation deficient samples, indicating anisotropy of the exchange interactions in the former sample with significant temperature dependence, most pronounced in the vicinity of T-O/O//.	en
heal.publisher	SPRINGER	en
heal.journalName	EUROPEAN PHYSICAL JOURNAL B	en
dc.identifier.isi	ISI:000232499600008	en
dc.identifier.volume	47	en
dc.identifier.issue	2	en
dc.identifier.spage	221	en
dc.identifier.epage	229	en