Ru-doped La0.7(Ba-Ca)0.3MnO3 thin films:: unexpected ferromagnetic insulating phase and positive magnetoresistance

被引：4
作者：
Hong, NH
Sakai, J
Noudem, JG
Gervais, F
Gervais, M
机构：
[1] Univ Tours, CNRS, UMR 6157, CEA,Lab LEMA, F-37200 Tours, France
[2] ISMRA Univ Caen, CNRS, UMR 6508, Lab CRISMAT, F-14050 Caen, France
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷
关键词：
manganite thin films; B-site doping; phase separation;
D O I：
10.1016/j.jmmm.2003.12.1373
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Physical properties of La0.7BaxCa0.3-xMn1-yRuyO3 thin films have been investigated. While La-Ba-Ca-Mn-O films have rather high T-C, Ru-doped samples have much lower T-C. La0.7Ba0.1Ca0.2Mn0.9Ru0.1O3 films show very anomalous behaviors: a ferromagnetic insulating phase between 75 and 190 K, and a positive magnetoresistance below insulator-to-metal transition temperature were observed. (C) 2004 Published by Elsevier B.V.
引用
收藏
页码：1826 / 1828
页数：3
相关论文
共 19 条
[1]   Antiferromagnetic metallic state in doped manganites [J].
Akimoto, T ;
Maruyama, Y ;
Moritomo, Y ;
Nakamura, A ;
Hirota, K ;
Ohoyama, K ;
Ohashi, M .
PHYSICAL REVIEW B, 1998, 57 (10) :R5594-R5597
[2]   Positive magnetoresistance from quantum interference effects in perovskite-type manganites [J].
Chen, P ;
Xing, DY ;
Du, YW .
PHYSICAL REVIEW B, 2001, 64 (10)
[3]   Cation size-temperature phase diagram of the manganites Ln(0.5)Sr(0.5)MnO(3) [J].
Damay, F ;
Maignan, A ;
Martin, C ;
Raveau, B .
JOURNAL OF APPLIED PHYSICS, 1997, 81 (03) :1372-1377
[4]   Transition-element doping effects in La0.7Ca0.3MnO3 [J].
Ghosh, K ;
Ogale, SB ;
Ramesh, R ;
Greene, RL ;
Venkatesan, T ;
Gapchup, KM ;
Bathe, R ;
Patil, SI .
PHYSICAL REVIEW B, 1999, 59 (01) :533-537
[5]   Anomalous behavior in La0.7Ba0.1Ca0.2Mn0.9Ru0.1O3 thin films -: art. no. 134412 [J].
Hong, NH ;
Sakai, J ;
Noudem, JG ;
Gervais, F ;
Gervais, M .
PHYSICAL REVIEW B, 2003, 67 (13)
[6]   Ferromagnetism at room temperature in La-Ba-Ca-Mn-O thin films [J].
Hong, NH ;
Sakai, J ;
Imai, S .
JOURNAL OF APPLIED PHYSICS, 2001, 89 (11) :6976-6978
[7]   Electronic and magnetic properties of La0.4Ba0.1Ca0.5MnO3-y thin films [J].
Hong, NH ;
Sakai, J ;
Imai, S .
JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :5600-5602
[8]  
HONG NH, 2002, UNPUB
[9]   Role of stoichiometry and structure in colossal magnetoresistive La1-xSrxMn1-yRuyO3+δ [J].
Krishnan, KM ;
Ju, HL .
PHYSICAL REVIEW B, 1999, 60 (21) :14793-14803
[10]   Magnetoresistance in Pr0.65Ba0.05Ca0.3Mn3-delta thin films [J].
Kumar, D ;
Singh, RK ;
Lee, CB .
PHYSICAL REVIEW B, 1997, 56 (21) :13666-13668
12