Chemical-pressure tailoring of low-field, room-temperature magnetoresistance in (Ca, Sr, Ba)Fe0.5Mo0.5O3

被引：46

作者：

Kim, BG

Hor, YS

Cheong, SW

机构：

[1] Bell Labs, Murray Hill, NJ 07974 USA

[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

来源：

APPLIED PHYSICS LETTERS | 2001年 / 79卷 / 03期

关键词：

D O I：

10.1063/1.1386617

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Low-field intergrain magnetoresistance (IMR) in the polycrystalline materials of double perovskite SrFe0.5Mo0.5O3 is found to be highly tunable by doping either Ca or Ba into the Sr site. The dopant exerts a chemical pressure, changing the Curie temperature and the magnetic softness. The room-temperature IMR at optimal doping (Sr0.2Ba0.8Fe0.5Mo0.5O3) is approximately 3.5% in 100 Oe, and increases further in high fields. The unprecedented magnitude of the IMR in this highly spin polarized system provides future grounds for employing magnetic materials for innovative magnetic technology. (C) 2001 American Institute of Physics.

引用

收藏

页码：388 / 390

页数：3

相关论文

共 21 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]

Galasso F., 1969, Structure, properties and preparation of perovskite type compounds

[3] Metallic and nonmetallic double perovskites:: A case study of A2FeReO6 (A = Ca, Sr, Ba) [J].

Gopalakrishnan, J ;

Chattopadhyay, A ;

Ogale, SB ;

Venkatesan, T ;

Greene, RL ;

Millis, AJ ;

Ramesha, K ;

Hannoyer, B ;

Marest, G .

PHYSICAL REVIEW B, 2000, 62 (14) :9538-9542

[4] LATTICE EFFECTS ON THE MAGNETORESISTANCE IN DOPED LAMNO3 [J].

HWANG, HY ;

CHEONG, SW ;

RADAELLI, PG ;

MAREZIO, M ;

BATLOGG, B .

PHYSICAL REVIEW LETTERS, 1995, 75 (05) :914-917

[5] 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

[6] Discrepancies between infrared and dc resistivities of La0.7Ca0.3MnO3 samples [J].

Kim, KH ;

Gu, JY ;

Choi, HS ;

Eom, DJ ;

Jung, JH ;

Noh, TW .

PHYSICAL REVIEW B, 1997, 55 (07) :4023-4026

[7] Large room-temperature intergrain magnetoresistance in double perovskite SrFe1-x(Mo or Re)xO3 [J].

Kim, TH ;

Uehara, M ;

Cheong, SW ;

Lee, S .

APPLIED PHYSICS LETTERS, 1999, 74 (12) :1737-1739

[8] Intergrain tunneling magnetoresistance in polycrystals of the ordered double perovskite Sr2FeReO6 [J].

Kobayashi, KI ;

Kimura, T ;

Tomioka, Y ;

Sawada, H ;

Terakura, K ;

Tokura, Y .

PHYSICAL REVIEW B, 1999, 59 (17) :11159-11162

[9] Room-temperature magnetoresistance in an oxide material with an ordered double-perovskite structure [J].

Kobayashi, KL ;

Kimura, T ;

Sawada, H ;

Terakura, K ;

Tokura, Y .

NATURE, 1998, 395 (6703) :677-680

[10] Intergrain magnetoresistance via second-order tunneling in perovskite manganites [J].

Lee, S ;

Hwang, HY ;

Shraiman, BI ;

Ratcliff, WD ;

Cheong, SW .

PHYSICAL REVIEW LETTERS, 1999, 82 (22) :4508-4511