National Changhua University of Education Institutional Repository : Item 987654321/16878

English | 正體中文 | 简体中文 | Items with full text/Total items : 6507/11669
Visitors : 29965053 Online Users : 416

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 Chemistry > Periodical Articles > Item 987654321/16878

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/16878

Title:	Preparation and Magnetic Properties of (La1−xSr1+x)(Mn0.5Co0.5)O4
Authors:	Lin, M. Y.;Wang, Y. F.;Ling, D. C.;Sheu, H. S.;Kao, H.-C. I.
Contributors:	化學系
Keywords:	(La 1-xSr 1+x)(Mn 0.5Co 0.5)O 4;Ferromagnetic;K2NiF4;Paramagnetic;Unit cell parameters
Date:	2010-07
Issue Date:	2013-06-06T02:33:25Z
Publisher:	Springer Science+Business Media
Abstract:	A series of single phase (La 1-xSr 1+x) (Mn 0.5Co 0.5)O 4 (0 ≤ x ≤ 0.40) materials with a tetragonal K 2NiF 4 structure was prepared by a solid state reaction method at 1400 or 1450 °C with a short period of heating time. Powder X-ray diffraction (XRD) and the Rietveld refinement method were employed for the structural analysis. Unit cell a- and c-axes decrease with increasing amount of Sr substitution. A discrepancy between the zero-field-cooled and the field-cooled magnetization is observed in all samples investigated below a characteristic temperature, T , which likely arises from the canted nature of spins or the random freezing of spins. It appears that T decreases with increasing amount of Sr substitution, which is possibly due to the enhancement of chemical pressure induced by Sr and a corresponding increases of the valence of Mn and/or Co.
Relation:	Journal of Superconductivity and Novel Magnetism, 23(5): 721-724
Appears in Collections:	[Department of Chemistry] Periodical Articles

Files in This Item:

File	Size	Format
index.html	0Kb	HTML	552	View/Open