Strain-driven charge-ordered state in La0.67Ca0.33MnO3 -: art. no. 184424

被引：180

作者：

Biswas, A ^{[1
]}

Rajeswari, M

Srivastava, RC

Venkatesan, T

Greene, RL

Lu, Q

de Lozanne, AL

Millis, AJ

机构：

[1] Univ Maryland, Dept Phys, Ctr Superconduct Res, College Pk, MD 20742 USA

[2] Univ Texas, Dept Phys, Austin, TX 78712 USA

[3] Rutgers State Univ, Dept Phys & Astron, Ctr Mat Theory, Piscataway, NJ 08854 USA

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.63.184424

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present evidence for the coexistence of ferromagnetic metallic and charge-ordered insulating phases in strained thin films of La0.67Ca0.33MnO3 at low temperatures. Such a phase-separated stale is confirmed using low-temperature magnetic force microscopy and magnetotransport measurements. This phase separated state is not observed in the bulk form of this compound and is caused by the structural inhomogeneities due to the nonuniform distribution of strain in the film. The strain weakens the low-temperature ferromagnetic metallic state and a charge-ordered insulator is formed at the high strain regions. The slow dynamics of the transport properties of the mixed phase is illustrated by measurements of the long-time scale relaxation of the electrical resistance.

引用

页数：7

共 26 条

[1] Charge ordering and polaron formation in the magnetoresistive oxide La0.7Ca0.3MnO3 [J].

Adams, CP ;

Lynn, JW ;

Mukovskii, YM ;

Arsenov, AA ;

Shulyatev, DA .

PHYSICAL REVIEW LETTERS, 2000, 85 (18) :3954-3957

[2]

AHN KH, CONDMAT0004295

[3] A simple approach to lattice effects in conducting perovskite-type oxides [J].

Attfield, JP .

CHEMISTRY OF MATERIALS, 1998, 10 (11) :3239-3248

[4] INTERPRETATION OF THE ACTIVATION-ENERGY DERIVED FROM A STRETCHED-EXPONENTIAL DESCRIPTION OF DEFECT DENSITY KINETICS IN HYDROGENATED AMORPHOUS-SILICON [J].

BENATAR, LE ;

REDFIELD, D ;

BUBE, RH .

JOURNAL OF APPLIED PHYSICS, 1993, 73 (12) :8659-8661

[5] Two-phase behavior in strained thin films of hole-doped manganites [J].

Biswas, A ;

Rajeswari, M ;

Srivastava, RC ;

Li, YH ;

Venkatesan, T ;

Greene, RL ;

Millis, AJ .

PHYSICAL REVIEW B, 2000, 61 (14) :9665-9668

[6] Low-temperature magnetic force microscopy of colossal magnetoresistive films [J].

Chen, CC ;

Lu, Q ;

de Lozanne, A .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1998, 66 (Suppl 1) :S1181-S1184

[7]

CHEN CC, 1996, P 10 ANN HTS WORKSH, P599

[8] Structural transition in large-lattice-mismatch heteroepitaxy [J].

Chen, Y ;

Washburn, J .

PHYSICAL REVIEW LETTERS, 1996, 77 (19) :4046-4049

[9]

Cheong SW, 1998, COLOSSAL MAGNETORESISTANCE, CHARGE ORDERING AND RELATED PROPERTIES OF MANGANESE OXIDES, P241

[10] Preparation and properties of epitaxial La0.7Ca0.3MnO3-δ films with reduced carrier density [J].

Dörr, K ;

De Teresa, JM ;

Müller, KH ;

Eckert, D ;

Walter, T ;

Vlakhov, E ;

Nenkov, K ;

Schultz, L .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (31) :7099-7109

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