Nonlinear conduction in charge-ordered Pr0.63Ca0.37MnO3:: Effect of magnetic fields

被引：60

作者：

Guha, A ^{[1
]}

Raychaudhuri, AK

Raju, AR

Rao, CNR

机构：

[1] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

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

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.62.5320

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nonlinear conduction in a single crystal of charge-ordered Pr0.63Ca0.37MnO3 has bren investigated in an applied magnetic field. In zero field, the nonlinear conduction, which starts at T< T-CO, can give rise to a region of negative differential resistance (NDR) which shows up below the Neel temperature. Application of a magnetic field Inhibits the appearance of NDR and makes the nonlinear conduction strongly hysteritic on cycling of the bias current. This is most severe in the temperature range where the charge-ordered state melts in an applied magnetic field. Our experiment strongly suggests that application of a magnetic field in the charge-ordering regime causes a coexistence of two phases.

引用

页码：5320 / 5323

页数：4

共 13 条

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

Asamitsu, A ;

Tomioka, Y ;

Kuwahara, H ;

Tokura, Y .

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

[2] Collapse of the charge ordering gap of Nd0.5Sr0.5MnO3 in an applied magnetic field [J].

Biswas, A ;

Arulraj, A ;

Raychaudhuri, AK ;

Rao, CNR .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (06) :L101-L107

[3] Anomalous melting transition of the charge-ordered state in manganites [J].

Chen, CH ;

Mori, S ;

Cheong, SW .

PHYSICAL REVIEW LETTERS, 1999, 83 (23) :4792-4795

[4] Structural changes, clustering, and photoinduced phase segregation in Pr0.7Ca0.3MnO3 [J].

Cox, DE ;

Radaelli, PG ;

Marezio, M ;

Cheong, SW .

PHYSICAL REVIEW B, 1998, 57 (06) :3305-3314

[5] 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

[6] Nonlinear electrical conduction and broad band noise in the charge-ordered rare earth manganate Nd0.5Ca0.5MnO3 [J].

Guha, A ;

Ghosh, A ;

Raychaudhuri, AK ;

Parashar, S ;

Raju, AR ;

Rao, CNR .

APPLIED PHYSICS LETTERS, 1999, 75 (21) :3381-3383

[7] Anomalous ferromagnetic spin fluctuations in an antiferromagnetic insulator Pr1-xCaxMnO3 [J].

Kajimoto, R ;

Kakeshita, T ;

Oohara, Y ;

Yoshizawa, H ;

Tomioka, Y ;

Tokura, Y .

PHYSICAL REVIEW B, 1998, 58 (18) :R11837-R11840

[8] 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

[9] Microstructure related to charge and orbital ordering in Pr0.5Ca0.5MnO3 [J].

Mori, S ;

Katsufuji, T ;

Yamamoto, N ;

Chen, CH ;

Cheong, SW .

PHYSICAL REVIEW B, 1999, 59 (21) :13573-13576

[10] Stability of a photoinduced insulator-metal transition in Pr1-xCaxMnO3 [J].

Ogawa, K ;

Wei, W ;

Miyano, K ;

Tomioka, Y ;

Tokura, Y .

PHYSICAL REVIEW B, 1998, 57 (24) :15033-15036

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