Effect of Ti ion doping on martensitic transition of La0.5Sr0.5Mn1-xTixO3

被引：11
作者：
Shang, C. [1 ,2 ]
Xia, Z. C. [1 ]
Jin, Z. [1 ,2 ]
Shi, L. R. [1 ,2 ]
Huang, J. W. [1 ,2 ]
Chen, B. R. [1 ,2 ]
Wei, M. [1 ,2 ]
Xiao, L. X. [1 ,2 ]
Liu, L. [2 ]
Huang, Y. [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 588卷
关键词：
Manganite; Localization; Martensitic transition; Doping; GIANT MAGNETORESISTANCE; TRANSPORT-PROPERTIES; FILMS; LA0.7SR0.3MN1-XTIXO3; PEROVSKITES;
D O I：
10.1016/j.jallcom.2013.11.030
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Electrical transport and magnetic properties of La0.5Sr0.5Mn1-xTixO3 (3x = 0, 0.1, 0.15 and 0.2) have been investigated. Experimental results show that the different Ti4+ doping level has obviously different effect on electrical transport and magnetization properties. Especially, a martensitic transition was observed in higher Ti4+ doping levels (3x = 0.15, 0.2). In which a doped Ti4+ ion substitutes a Mn4+ ion, with increasing in Ti4+ doping level from x = 0 to 0.2, the ratio of Mn3+/Mn4+ increases from 1 to 5/3, that is the coupling via Mn3+-O-2-Mn4+ double exchange increases leading to a localized ferromagnetic domain in the charge ordering of matrix of La0.5Sr0.5MnO3. With the increasing of magnetic field to a critical field, the localized magnetic moment was delocalized and rotated to parallel to an applied field showing a martensitic transition. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码：53 / 58
页数：6
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