Evidence of spin-polarized tunneling in phase-separated manganites La1/3Sr2/3-xBaxMnO3 (0≤x≤0.67)

被引：4

作者：

Jiang, Y ^{[1
]}

Yuan, SL

Hu, JF

Liu, L

机构：

[1] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China

[2] Natl Univ Singapore, Dept Elect & Comp Engn, Informat Storage Mat Lab, Singapore 117576, Singapore

来源：

APPLIED PHYSICS LETTERS | 2001年 / 79卷 / 21期

关键词：

D O I：

10.1063/1.1420531

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Polycrystalline La-1/3(Sr,Ba)(2/3)MnO3 (0 less than or equal tox less than or equal to0.67) bulk samples were fabricated by solid-state reaction. Structural analysis by Rietveld refinement shows the phase separation while x exceeds 0.1. This phase separation leads to dramatic changes in transport properties for the samples. For the sample La1/3Ba2/3MnO3, the current-voltage and dynamic conductance characteristics demonstrate a spin-polarized tunneling behavior below similar to 150 K. The spin-polarized tunneling induces a large magnetoresistance under low magnetic field. (C) 2001 American Institute of Physics.

引用

页码：3470 / 3472

页数：3

共 10 条

[1] Magnetic ordering and granularity effects in La1-xBaxMnO3 [J].

Budhani, RC ;

Roy, C ;

Lewis, LH ;

Li, QA ;

Moodenbaugh, AR .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (05) :2490-2496

[2] Tuning of colossal magnetoresistance via grain size change in La0.67Ca0.33MnO3 [J].

Hueso, LE ;

Rivas, J ;

Rivadulla, F ;

López-Quintela, MA .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (07) :3881-3884

[3] THOUSANDFOLD CHANGE IN RESISTIVITY IN MAGNETORESISTIVE LA-CA-MN-O FILMS [J].

JIN, S ;

TIEFEL, TH ;

MCCORMACK, M ;

FASTNACHT, RA ;

RAMESH, R ;

CHEN, LH .

SCIENCE, 1994, 264 (5157) :413-415

[4] TUNNELING BETWEEN FERROMAGNETIC-FILMS [J].

JULLIERE, M .

PHYSICS LETTERS A, 1975, 54 (03) :225-226

[5] MAGNETIC FIELD SPLITTING OF QUASIPARTICLE STATES IN SUPERCONDUCTING ALUMINUM FILMS [J].

MESERVEY, R ;

TEDROW, PM ;

FULDE, P .

PHYSICAL REVIEW LETTERS, 1970, 25 (18) :1270-&

[6] LARGE MAGNETORESISTANCE AT ROOM-TEMPERATURE IN FERROMAGNETIC THIN-FILM TUNNEL-JUNCTIONS [J].

MOODERA, JS ;

KINDER, LR ;

WONG, TM ;

MESERVEY, R .

PHYSICAL REVIEW LETTERS, 1995, 74 (16) :3273-3276

[7] Bias dependent intergrain tunneling in lanthanum manganite thin films [J].

Nakano, K ;

Naoe, M ;

Yamasaki, M ;

Choi, KK ;

Taniyama, T ;

Yamazaki, Y .

IEEE TRANSACTIONS ON MAGNETICS, 1999, 35 (05) :2859-2861

[8] Magnetic properties at surface boundary of a half-metallic ferromagnet La0.7Sr0.3MnO3 [J].

Park, JH ;

Vescovo, E ;

Kim, HJ ;

Kwon, C ;

Ramesh, R ;

Venkatesan, T .

PHYSICAL REVIEW LETTERS, 1998, 81 (09) :1953-1956

[9] Raman, infrared and x-ray diffraction study of phase stability in La1-xBaxMnO3 doped manganites [J].

Roy, C ;

Budhani, RC .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (06) :3124-3131

[10] LOW-TEMPERATURE MAGNETORESISTANCE AND THE MAGNETIC PHASE-DIAGRAM OF LA1-XCAXMNO3 [J].

SCHIFFER, P ;

RAMIREZ, AP ;

BAO, W ;

CHEONG, SW .

PHYSICAL REVIEW LETTERS, 1995, 75 (18) :3336-3339

← 1 →