Microstructure related to charge and orbital ordering in Pr0.5Ca0.5MnO3

被引：57

作者：

Mori, S ^{[1
]}

Katsufuji, T

Yamamoto, N

Chen, CH

Cheong, SW

机构：

[1] AT&T Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA

[2] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.59.13573

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the microstructure related to the charge and orbital ordering in the manganites Pr0.5Ca0.5MnO3 by transmission electron microscopy. Electron diffraction clearly shows the presence of the incommensurate structure in the paramagnetic insulator phase of Pr0.5Ca0.5MnO3 between 180 and 260 K. Our experimental results clearly show that the incommensurate-to-commensurate (IC-to-C) charge-ordering transition was correspondent with the paramagnetic to antiferromagnetic transition around 180 K. Dark field images also revealed the motion of the discommensurations during the IC-to-C transition. A model of the IC structure which involves the presence of the partial orbital disordering and the complete charge ordering is proposed.

引用

页码：13573 / 13576

页数：4

共 19 条

[1] Role of the A-site size and oxygen stoichiometry in charge ordering commensurability of Ln0.50Ca0.50MnO3 manganites [J].

Barnabe, A ;

Hervieu, M ;

Martin, C ;

Maignan, A ;

Raveau, B .

JOURNAL OF APPLIED PHYSICS, 1998, 84 (10) :5506-5514

[2] MICROSTRUCTURE IN THE INCOMMENSURATE AND THE COMMENSURATE CHARGE-DENSITY-WAVE STATES OF 2H-TASE2 - A DIRECT OBSERVATION BY ELECTRON-MICROSCOPY [J].

CHEN, CH ;

GIBSON, JM ;

FLEMING, RM .

PHYSICAL REVIEW B, 1982, 26 (01) :184-205

[3] Commensurate to incommensurate charge ordering and its real-space images in La0.5Ca0.5MnO3 [J].

Chen, CH ;

Cheong, SW .

PHYSICAL REVIEW LETTERS, 1996, 76 (21) :4042-4045

[4] DIRECT OBSERVATION OF CHARGE-DENSITY-WAVE DISCOMMENSURATIONS AND DISLOCATIONS IN 2H-TASE2 [J].

CHEN, CH ;

GIBSON, JM ;

FLEMING, RM .

PHYSICAL REVIEW LETTERS, 1981, 47 (10) :723-725

[5] INSITU OBSERVATION OF COMMENSURATION PROCESS OF LONG-PERIOD SUPERLATTICE IN THE AG-MG ALLOYS [J].

FUJINO, Y ;

SATO, H ;

HIRABAYASHI, M ;

AOYAGI, E ;

KOYAMA, Y .

PHYSICAL REVIEW LETTERS, 1987, 58 (10) :1012-1015

[6] STRUCTURAL AND MAGNETIZATION STUDY OF PR1-XCAXMNO3 [J].

JIRAK, Z ;

KRUPICKA, S ;

NEKVASIL, V ;

POLLERT, E ;

VILLENEUVE, G ;

ZOUNOVA, F .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1980, 15-8 (JAN-) :519-520

[7] NEUTRON-DIFFRACTION STUDY OF PR1-XCAXMNO3 PEROVSKITES [J].

JIRAK, Z ;

KRUPICKA, S ;

SIMSA, Z ;

DLOUHA, M ;

VRATISLAV, S .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1985, 53 (1-2) :153-166

[8] Paired and unpaired charge stripes in the ferromagnetic phase of La0.5Ca0.5MnO3 [J].

Mori, S ;

Chen, CH ;

Cheong, SW .

PHYSICAL REVIEW LETTERS, 1998, 81 (18) :3972-3975

[9] Pairing of charge-ordered stripes in (La,Ca)MnO3 [J].

Mori, S ;

Chen, CH ;

Cheong, SW .

NATURE, 1998, 392 (6675) :473-476

[10] EVOLUTION OF A FERROELASTIC DOMAIN-STRUCTURE IN AN INCOMMENSURATE PHASE OF BARIUM SODIUM NIOBATE (BA2NANB5O15) [J].

MORI, S ;

YAMAMOTO, N ;

KOYAMA, Y ;

UESU, Y .

PHYSICAL REVIEW B, 1995, 52 (09) :6158-6161

← 1 2 →