Publicação

High-field magnetoresistance of La0.67Sr0.33MnO3 thin films deposited on LiNbO3 substrates

Detalhes bibliográficos
Resumo:	Colossal magnetoresistive manganites have been widely studied due to their potential use in sensor and device applications. In this work, La0.67Sr0.33MnO3 thin ﬁlms were deposited by pulsed laser ablation on LiNbO3 substrates and magnetoresistance measurements were performed using pulsed magnetic ﬁelds up to 25 T. The corresponding magnetoconductance of the ﬁlms was ﬁtted in order to obtain the grain boundary (GB) contribution to the transport properties. The observed temperature dependence of the ﬁtting parameters was indicative of antiferromagnetism across GB spins and reﬂected the progressive reduction of magnetic ordering with increasing temperature.
Autores principais:	Gomes, I. T.
Outros Autores:	Pereira, A. M.; Ventura, J.; Carpinteiro, F.; Moreira, J. M.; Araújo, João P.; Barbosa, José Gusman; Almeida, B. G.
Assunto:	Lanthanum strontium manganite Pulsed laser ablation Magnetoresistance High magnetic ﬁelds High magnetic fields Ciências Naturais::Ciências Físicas
Ano:	2010
País:	Portugal
Tipo de documento:	artigo
Tipo de acesso:	acesso aberto
Instituição associada:	Universidade do Minho
Idioma:	inglês
Origem:	RepositóriUM - Universidade do Minho

Descrição
Resumo:	Colossal magnetoresistive manganites have been widely studied due to their potential use in sensor and device applications. In this work, La0.67Sr0.33MnO3 thin ﬁlms were deposited by pulsed laser ablation on LiNbO3 substrates and magnetoresistance measurements were performed using pulsed magnetic ﬁelds up to 25 T. The corresponding magnetoconductance of the ﬁlms was ﬁtted in order to obtain the grain boundary (GB) contribution to the transport properties. The observed temperature dependence of the ﬁtting parameters was indicative of antiferromagnetism across GB spins and reﬂected the progressive reduction of magnetic ordering with increasing temperature.

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