Effect of Pr-Ca substitution on the transport and magnetic behavior of LaMnO3 perovskite

Autor:	M.S. Sahasrabudhe, C. M. Thaker, D. S. Rana, S. Rayaprol, Krushna Mavani, D. G. Kuberkar, Shankar I. Patil
Rok vydání:	2002
Předmět:	Diffraction chemistry.chemical_classification Crystallography Materials science Valence (chemistry) Colossal magnetoresistance Magnetoresistance Condensed matter physics chemistry Electrical resistivity and conductivity Cell volume General Physics and Astronomy Divalent
Zdroj:	Pramana. 58:1035-1039
ISSN:	0973-7111 0304-4289
DOI:	10.1007/s12043-002-0213-2
Popis:	The effect of simultaneous substitution of a fluctuating cation and a divalent cation in LaMnO3 perovskite modifies the properties of the material to exhibit large valence colossal magnetoresistance (CMR) effect. A good example of these properties is (La1−2x Pr x Ca x )MnO3 (LPCMO) type CMR material. In this communication it is reported that, with the increase in x (for x=0.1, 0.15, 0.2), the T c varies between 100 and 120 K with improvisation in metal-insulator transition. Interestingly, resistance increases with x from few hundred ohms to few kilo ohms with corresponding decrease in the unit cell volume. The results of the studies using X-ray diffraction (XRD), electrical resistivity, magnetoresistance and ac susceptibility measurements on LPCMO samples for understanding the structural, transport and magnetic properties are discussed in detail.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::979616b66852fcc4f3dd8a78beb63595 https://doi.org/10.1007/s12043-002-0213-2 Zobrazit plný text záznamu Full text from SpringerLink