Field-induced transition in the layered manganite LaEu0.2Sr1.8Mn2O7

Autor:	Peng Yuan, Fang-wei Wang, Jun Zhang, Panlin Zhang, Qiwei Yan
Rok vydání:	2001
Předmět:	Colossal magnetoresistance Condensed matter physics Magnetic structure Octahedron Ferromagnetism Chemistry General Materials Science Giant magnetoresistance Metal–insulator transition Condensed Matter Physics Manganite Metamagnetism
Zdroj:	Journal of Physics: Condensed Matter. 13:917-927
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/13/5/311
Popis:	We report on the effect of substitution of Eu on the structure, magnetic and transport properties of the layered manganese oxides La1.2-xEuxSr1.8Mn2O7 (x = 0-0.4). With Eu substituting for some of the La, the MnO6 octahedron shows an anomalous lattice distortion, especially in the case of x = 0.2. Eu substitution suppresses the ferromagnetic (FM) metallic state, resulting in a FM cluster-glass state for xleq0.2 and no magnetic ordering for x>0.2. LaEu0.2Sr1.8Mn2O7 (x = 0.2) undergoes a metamagnetic transition from the proposed layered FM cluster-glass state to the long-range FM state under a 4 T field, as well as a magnetic-field-induced insulating-metallic transition. The relationships among the lattice effect, exchange interactions and magnetotransport properties are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ebbe7a59d5a4dc8210973ef6016313ee https://doi.org/10.1088/0953-8984/13/5/311 Zobrazit plný text záznamu