Influence of Gd-doping in La0.7Ca0.3MnO3 on its structural and magneto-electrical properties
Yükleniyor...
Tarih
2012
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Bv
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Bulk samples of gadolinium doped manganites with compositional formula La0.7-xGdxCa0.3MnO3 (x=0.0 and 0.1) were prepared by conventional solid state reaction method. After characterizing the samples by X-ray diffraction, scanning electron microscope and energy dispersive X-ray spectrometer, a systematic investigation of electrical and magneto-transport properties has been investigated. The replacement of La ion by Gd results in a decrease of the metal-insulator transition temperature T-MI and the magnetoresistance as well as the resistivity are found to increase. The electrical resistivity in the entire temperature range fit well with the phenomenological percolation model, which is based upon an approach that the system consists of the phase separated ferromagnetic metallic and paramagnetic insulating regions. (C) 2011 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Colossal Magnetoresistance (CMR), Rare Earth Doping, Metal-insulator Transition, Manganites
Kaynak
Journal Of Magnetism And Magnetic Materials
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
324
Sayı
7
