Reexamination of the role of SrMoO4 in the enhancement of the low-field magnetoresistance of Sr2FeMoO6

被引：7

作者：

Fang, TT ^{[1
]}

Lin, JC ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 701, Taiwan

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2004年 / 87卷 / 07期

关键词：

D O I：

10.1111/j.1551-2916.2004.tb20098.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Different ratios of the precursor phases of SrFeO3-x (SFO) and SrMoO4 (SMO) were used to prepare Sr2FeMoO6 (SFMO) by a solid-state reaction. X-ray diffraction was used to identify the phases. A residual SMO was observed to exist in the sample with an SFO/SMO ratio of 0.9:1. The sample-with a residual SMO phase had higher resistivity, lower magnetization, but higher low-field magnetoresistance (LFMR). High-resolution transmission electron microscopy was used to identify the compositions and phases. Nanometer-sized amorphous-like clusters of SMO phase were located inside the grains rather than at grain boundaries; however, some boundaries were rich in the strontium ion. The possible mechanisms for the conduction and the increase of LFMR of SFMO are discussed.

引用

页码：1343 / 1346

页数：4

共 23 条

[1] Pulsed-laser-deposited epitaxial Sr2FeMoO6-y thin films:: Positive and negative magnetoresistance regimes [J].

Asano, H ;

Ogale, SB ;

Garrison, J ;

Orozco, A ;

Li, YH ;

Li, E ;

Smolyaninova, V ;

Galley, C ;

Downes, M ;

Rajeswari, M ;

Ramesh, R ;

Venkatesan, T .

APPLIED PHYSICS LETTERS, 1999, 74 (24) :3696-3698

[2] Conduction and magnetoresistance in doped manganite grain boundaries [J].

Blamire, MG ;

Schneider, CW ;

Hammerl, G ;

Mannhart, J .

APPLIED PHYSICS LETTERS, 2003, 82 (16) :2670-2672

[3] Structural phase transition and the electronic and magnetic properties of Sr2FeMoO6 [J].

Chmaissem, O ;

Kruk, R ;

Dabrowski, B ;

Brown, DE ;

Xiong, X ;

Kolesnik, S ;

Jorgensen, JD ;

Kimball, CW .

PHYSICAL REVIEW B, 2000, 62 (21) :14197-14206

[4] Defect-induced spin disorder and magnetoresistance in single-crystal and polycrystal rare-earth manganite thin films [J].

Evetts, JE ;

Blamire, MG ;

Mathur, ND ;

Isaac, SP ;

Teo, BS ;

Cohen, LF ;

Macmanus-Driscoll, JL .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1998, 356 (1742) :1593-1613

[5] Factors affecting the preparation of Sr2Fe2-xMoxO6 [J].

Fang, TT ;

Ko, TF .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2003, 86 (09) :1453-1455

[6] On the formation of double perovskite Sr2FeMoO6 [J].

Fang, TT ;

Wu, MS ;

Ko, TF .

JOURNAL OF MATERIALS SCIENCE LETTERS, 2001, 20 (17) :1609-1610

[7] Grain-boundary capacitance of La0.7Ca0.3MnO3 films -: art. no. 094422 [J].

Glaser, A ;

Ziese, M .

PHYSICAL REVIEW B, 2002, 66 (09) :944221-944225

[8] Model for spin-polarized transport in perovskite manganite bicrystal grain boundaries [J].

Gunnarsson, R ;

Kadigrobov, A ;

Ivanov, Z .

PHYSICAL REVIEW B, 2002, 66 (02) :1-5

[9] 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

[10] Valency pair and properties of 1:1 ordered perovskite-type compounds Sr(2)MMoO(6) (M=Mn,Fe,Co) [J].

Itoh, M ;

Ohta, I ;

Inaguma, Y .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1996, 41 (01) :55-58

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