Quench-disorder-controlled magnetoresistance in Sm0.55Sr0.45MnO3

被引：40

作者：

Egilmez, M. ^{[1
]}

Chow, K. H.

Jung, J.

Salman, Z.

机构：

[1] Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada

[2] Univ Oxford, Clarendon Lab, Dept Phys, Oxford OX1 3PU, England

[3] Rutherford Appleton Lab, ISIS Facil, Chilton OX11 0QX, Oxon, England

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 16期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1063/1.2724906

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors studied the low-field magnetoresistance of Sm1-xSrxMnO3 (x=0.45) which was sintered at different elevated temperatures followed by fast cooling (thermal quenching). Near the metal insulator transition the magnetoresistance is dramatically enhanced while the magnitude and width of the resistive peak are significantly reduced by increasing the sintering/quenching temperature, approaching the values observed in a single crystal of the same composition. They attribute these effects to an increase of the grain size in the system. (C) 2007 American Institute of Physics.

引用

页数：3

共 17 条

[1] Normal-state diamagnetism of charged bosons in cuprate superconductors [J].

Alexandrov, AS .

PHYSICAL REVIEW LETTERS, 2006, 96 (14)

[2] Carrier density collapse and colossal magnetoresistance in doped manganites [J].

Alexandrov, AS ;

Bratkovsky, AM .

PHYSICAL REVIEW LETTERS, 1999, 82 (01) :141-144

[3] Current switching of resistive states in magnetoresistive manganites [J].

Asamitsu, A ;

Tomioka, Y ;

Kuwahara, H ;

Tokura, Y .

NATURE, 1997, 388 (6637) :50-52

[4] Relevance of cooperative lattice effects and stress fields in phase-separation theories for CMR manganites [J].

Burgy, J ;

Moreo, A ;

Dagotto, E .

PHYSICAL REVIEW LETTERS, 2004, 92 (09) :097202-1

[5] Percolative transitions with first-order characteristics in the context of colossal magnetoresistance manganites [J].

Burgy, J ;

Dagotto, E ;

Mayr, M .

PHYSICAL REVIEW B, 2003, 67 (01)

[6] Colossal effects in transition metal oxides caused by intrinsic inhomogeneities [J].

Burgy, J ;

Mayr, M ;

Martin-Mayor, V ;

Moreo, A ;

Dagotto, E .

PHYSICAL REVIEW LETTERS, 2001, 87 (27) :277202-277202

[7] Oxygen-redistribution-induced disorder and magnetotransport properties of Sm0.55Sr0.45MnO3 manganites [J].

Egilmez, M. ;

Chow, K. H. ;

Jung, J. .

APPLIED PHYSICS LETTERS, 2006, 89 (06)

[8]

EGILMEZ M, UNPUB

[9] Isotope-driven perturbation of the ground-state properties in (Sm, Gd)-Sr manganites near the half-doped hole concentration [J].

Isaac, I ;

Jung, J ;

Franck, JP ;

Abdelhadi, M .

PHYSICAL REVIEW B, 2004, 70 (21) :1-4

[10] Conductive mechanism in manganite materials [J].

Liu, XM ;

Zhu, H ;

Zhang, YH .

PHYSICAL REVIEW B, 2002, 65 (02) :1-6

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