Influence of CoO phase on structural, magnetic and electrical properties of La0.7Ca0.3MnO3 and La0.7Sr0.3MnO3

被引：0

作者：

Bian, Jin Long ^{[1
]}

Seo, Yong Jun ^{[1
]}

Kim, Geun Woo ^{[1
]}

Sung, Chang Hoon ^{[1
]}

Kumar, Shalendra ^{[1
]}

Lee, Chan Gyu ^{[1
]}

Koo, Bon Heun ^{[1
]}

机构：

[1] Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea

来源：

MULTI-FUNCTIONAL MATERIALS AND STRUCTURES III, PTS 1 AND 2 | 2010年 / 123-125卷

关键词：

magnetoresistance(MR%); CMR; electrical transport; spin tunneling; ENHANCED MAGNETORESISTANCE; TEMPERATURE;

D O I：

10.4028/www.scientific.net/AMR.123-125.125

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The composites of (1-x)La0.7Ca0.3MnO3/xCoO and (1-x)La0.7Ca0.3MnO3/xCoO (x =0 similar to 0.09) were fabricated by conventional solid state reaction method, and their electrical transport and magnetoresistance (MR%) properties were investigated by physical property measurement system (PPMS). The result of x-ray diffraction (XRD) and scanning electronic microscopy (SEM) indicated that no new phase appeared in the composites except manganites matrix and CoO phases. CoO is mainly distributed at the grain boundaries and surfaces of the matrix. The resistivity LCMO and LSMO based composites were measured in the range 90-320K and 90-400K, respectively. The applied magnetic field is 0T and 0.5T. The observed variation of MR with varying Ca and Sr concentration has been qualitatively investigated.

引用

页码：125 / 128

页数：4

共 11 条

[1]

Balcells L.I., 1999, APPL PHYS LETT, V74, P26

[2] Grain-boundary effects on the electrical resistivity and the ferromagnetic transition temperature of La0.8Ca0.2MnO3 [J].

Fu, YL .

APPLIED PHYSICS LETTERS, 2000, 77 (01) :118-120

[3] Low-field MR behaviour in La0.67Ca0.33MnO3/ZrO2 composite system [J].

Huang, BX ;

Liu, YH ;

Zhang, RZ ;

Xiaobo-Yuan ;

Wang, CJ ;

Mei, LM .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2003, 36 (16) :1923-1927

[4] Enhanced magnetoresistance in granular La2/3Ca1/3MnO3 polymer composites [J].

Huang, YH ;

Chen, X ;

Wang, ZM ;

Liao, CS ;

Yan, CH ;

Zhao, HW ;

Shen, BG .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) :7733-7735

[5] Magnetoresistance in manganite/alumina nanocrystalline composites [J].

Hueso, LE ;

Rivas, J ;

Rivadulla, F ;

López-Quintela, MA .

JOURNAL OF APPLIED PHYSICS, 2001, 89 (03) :1746-1750

[6] Spin-polarized intergrain tunneling in La-2/Sr-3(1)/3MnO3 [J].

Hwang, HY ;

Cheong, SW ;

Ong, NP ;

Batlogg, B .

PHYSICAL REVIEW LETTERS, 1996, 77 (10) :2041-2044

[7]

Kittel C., 2005, Introduction to Solid State Physics

[8] Enhanced magnetoresistance in sintered granular manganite/insulator systems [J].

Petrov, DK ;

Krusin-Elbaum, L ;

Sun, JZ ;

Feild, C ;

Duncombe, PR .

APPLIED PHYSICS LETTERS, 1999, 75 (07) :995-997

[9] Large room temperature magnetoresistance in YSZ doped La0.67Ba0.33MnO3 composite [J].

Xia, ZC ;

Yuan, SL ;

Feng, W ;

Zhang, LJ ;

Zhang, GH ;

Tang, J ;

Liu, L ;

Liu, S ;

Peng, G ;

Niu, DW ;

Chen, L ;

Zheng, QH ;

Fang, ZH ;

Tang, CQ .

SOLID STATE COMMUNICATIONS, 2003, 128 (08) :291-294

[10] GIANT MAGNETORESISTANCE IN EPITAXIAL ND0.7SR0.3MNO3-DELTA THIN-FILMS [J].

XIONG, GC ;

LI, Q ;

JU, HL ;

MAO, SN ;

SENAPATI, L ;

XI, XX ;

GREENE, RL ;

VENKATESAN, T .

APPLIED PHYSICS LETTERS, 1995, 66 (11) :1427-1429

← 1 2 →