Oxygen-isotope exchange and cation disorder effects on magneto-transport properties of (Sm1-yGdy)0.55Sr0.45MnO3

被引：11

作者：

Egilmez, M. ^{[1
]}

Isaac, I. ^{[1
]}

Lawrie, D. D. ^{[1
]}

Chow, K. H. ^{[1
]}

Jung, J. ^{[1
]}

机构：

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

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2008年 / 18卷 / 47期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1039/b809368g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Detailed systematic studies of the effects of both the cation disorder and the oxygen isotope exchange O-16 -> O-18 on the magneto- transport properties of (Sm1-yGdy)(0.55)Sr(0.4)5MnO(3) manganites were performed for y between 0 and 1. We investigated changes in the temperature and magnetic field dependence of the magnetization, resistivity and magneto- resistivity, including the effects of the oxygen isotope substitution on the magneto- transport properties of samples with high magneto- resistance and the oxygen-isotope exchange induced metal-insulator transition. Very large cation disorder leads to a formation of the insulating spin-glass state in which no colossal magneto- resistance or field-induced ferromagnetism occurs. There is also no significant effect of the oxygen isotope exchange on samples in the spin-glass state.

引用

页码：5796 / 5801

页数：6

共 35 条

[1] Theory of colossal magnetoresistance in doped manganites [J].

Alexandrov, AS ;

Bratkovsky, AM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (08) :1989-2005

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

Alexandrov, AS ;

Bratkovsky, AM .

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

[3] Metal-insulator transition induced by oxygen isotope exchange in the magnetoresistive perovskite manganites [J].

Babushkina, NA ;

Belova, LM ;

Gorbenko, OY ;

Kaul, AR ;

Bosak, AA ;

Ozhogin, VI ;

Kugel, KI .

NATURE, 1998, 391 (6663) :159-161

[4] Continuous charge modulated diagonal phase in manganites [J].

Brey, L .

PHYSICAL REVIEW LETTERS, 2004, 92 (12) :127202-1

[5] Complexity in strongly correlated electronic systems [J].

Dagotto, E .

SCIENCE, 2005, 309 (5732) :257-262

[6] Ferromagnetism and electron-phonon coupling in the manganites [J].

Edwards, DM .

ADVANCES IN PHYSICS, 2002, 51 (05) :1259-1318

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

Egilmez, M. ;

Chow, K. H. ;

Jung, J. ;

Salman, Z. .

APPLIED PHYSICS LETTERS, 2007, 90 (16)

[9] Metal-insulator transition, specific heat, and grain-boundary-induced disorder in Sm0.55Sr0.45MnO3 [J].

Egilmez, M. ;

Chow, K. H. ;

Jung, J. ;

Fan, I. ;

Mansour, A. I. ;

Salman, Z. .

APPLIED PHYSICS LETTERS, 2008, 92 (13)

[10] Oxygen isotope effect of the paramagnetic-insulating to ferromagnetic-metallic transition in La1-xCaxMnO3 [J].

Franck, JP ;

Isaac, I ;

Chen, WM ;

Chrzanowski, J ;

Irwin, JC .

PHYSICAL REVIEW B, 1998, 58 (09) :5189-5192

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