National Changhua University of Education Institutional Repository : Item 987654321/15426

English | 正體中文 | 简体中文 | Items with full text/Total items : 6507/11669
Visitors : 30018442 Online Users : 417

RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.

Scope Adv. Search

Login ‧ Upload ‧ Help ‧ About ‧ Administer

NCUEIR > College of Science > Department of Physics > Periodical Articles > Item 987654321/15426

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/15426

Title:	Transport Behavior of Yttrium Substituted Polycrystalline La0.7Pb0.3MnO3
Authors:	Lin, C. H.;Young, S. L.;Chen, H. Z.;Ou, C. R.;Kao, M. C.;Horng, Lance
Contributors:	物理學系
Keywords:	Ceramics;Conductivity;Magnetic properties
Date:	2008-12
Issue Date:	2013-02-05T02:20:22Z
Publisher:	Elsevier
Abstract:	The transport properties in La0.7−xYxPb0.3MnO3 (0.0 ⩽ x ⩽ 0.2) is investigated. The substitution of La3+ ions by smaller nonmagnetic Y3+ leads to greater spin disorder and induces variations in the magnetotransport behavior. From resistivity versus temperature curves a metal–insulator transition phenomenon is observed at the transition temperature, TP, decreases as the Y content increases. The resistivity is well fitted using the equation ρ(T) = ρnexp[(T∗/T)n] with n = 1/4 and n = 1/2 at high and intermediate temperatures, respectively. The characteristic temperature T∗ varies with Y content in a manner consistent with the localization model of variable range hopping. Below TP, resistivity varies as a function of power law contributions, ρ = ρ0 + ρ2T2 + ρ5/2T5/2, corresponding to the electron scattering processes in the ferromagnetic phase.
Relation:	Journal of Non-Crystalline Solids, 354(47-51): 5290-5291
Appears in Collections:	[Department of Physics] Periodical Articles

Files in This Item:

File	Size	Format
index.html	0Kb	HTML	560	View/Open