Electric-field-induced melting of the randomly pinned charge-ordered states of rare-earth manganates and associated effects

被引：128

作者：

Rao, CNR

Raju, AR

Ponnambalam, V

Parashar, S

Kumar, N

机构：

[1] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Bangalore 560064, Karnataka, India

[2] Raman Res Inst, Bangalore 560080, Karnataka, India

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.61.594

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Films of charge-ordered Nd0.5Ca0.5MnO3, Gd0.5Ca0.5MnO3, Y0.5Ca0.5MnO3, and Nd0.5Sr0.5MnO3 show insulator-metal transitions on the passage of small electrical currents. That such an electric-field-induced transition occurs even in Y0.5Ca0.5MnO3 where the charge-ordered state is not affected by magnetic fields is noteworthy. The transition is attributed to the depinning of the randomly pinned charge solid. These materials also exhibit an interesting memory effect probably due to the randomness of the strength as well as the position of the pinning centers.

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页码：594 / 598

页数：5

相关论文

共 21 条

[1] Epitaxial nature of the films of LaNiO3, Pb(Zr0.5Ti0.5)O-3, and La0.95Mn0.95O3 obtained by nebulized spray pyrolysis [J].

Aiyer, HN ;

Raju, AR ;

Subbanna, GN ;

Rao, CNR .

CHEMISTRY OF MATERIALS, 1997, 9 (03) :755-760

[2] The nature of the charge-ordered state in Y0.5Ca0.5MnO3 with a very small average radius of the A-site cations [J].

Arulraj, A ;

Gundakaram, R ;

Biswas, A ;

Gayathri, N ;

Raychaudhuri, AK ;

Rao, CNR .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (20) :4447-4456

[3] Charge ordering in the rare-earth manganates:: the origin of the extraordinary sensitivity to the average radius of the A-site cations, ⟨rA⟩ [J].

Arulraj, A ;

Santhosh, PN ;

Gopalan, RS ;

Guha, A ;

Raychaudhuri, AK ;

Kumar, N ;

Rao, CNR .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (38) :8497-8504

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

Asamitsu, A ;

Tomioka, Y ;

Kuwahara, H ;

Tokura, Y .

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

[5] Weak ferromagnetism, metal-to-nonmetal transition, and negative differential resistivity in single-crystal Sr2IrO4 [J].

Cao, G ;

Bolivar, J ;

McCall, S ;

Crow, JE ;

Guertin, RP .

PHYSICAL REVIEW B, 1998, 57 (18) :R11039-R11042

[6] Visualization of the local insulator-metal transition in Pr0.7Ca0.3MnO3 [J].

Fiebig, M ;

Miyano, K ;

Tomioka, Y ;

Tokura, Y .

SCIENCE, 1998, 280 (5371) :1925-1928

[7] THE DYNAMICS OF CHARGE-DENSITY WAVES [J].

GRUNER, G .

REVIEWS OF MODERN PHYSICS, 1988, 60 (04) :1129-1182

[8]

Kuwahara H, 1998, COLOSSAL MAGNETORESISTANCE, CHARGE ORDERING AND RELATED PROPERTIES OF MANGANESE OXIDES, P217

[9] A FIRST-ORDER PHASE-TRANSITION INDUCED BY A MAGNETIC-FIELD [J].

KUWAHARA, H ;

TOMIOKA, Y ;

ASAMITSU, A ;

MORITOMO, Y ;

TOKURA, Y .

SCIENCE, 1995, 270 (5238) :961-963

[10] Breakdown of the charge-ordered state in Nd0.5Sr0.5MnO3 [J].

Mori, T .

PHYSICAL REVIEW B, 1998, 58 (19) :12543-12546