Crossover from incommensurate to commensurate magnetic orderings in CoCr2O4

被引：48

作者：

Chang, L. J. ^{[1
]}

Huang, D. J. ^{[2
]}

Li, W-H ^{[3
,4
]}

Cheong, S-W ^{[5
]}

Ratcliff, W. ^{[6
]}

Lynn, J. W. ^{[6
]}

机构：

[1] Natl Tsing Hua Univ, Nucl Sci & Technol Dev Ctr, Hsinchu 30013, Taiwan

[2] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[3] Natl Cent Univ, Dept Phys, Jhongli 32001, Taiwan

[4] Natl Cent Univ, Ctr Neutron Beam Applicat, Jhongli 32001, Taiwan

[5] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[6] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20742 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 45期

关键词：

COBALT;

D O I：

10.1088/0953-8984/21/45/456008

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The conical spin order of multiferroic CoCr2O4 has been studied by a neutron diffraction to investigate its magnetic phase transitions at temperatures below 40 K. Magnetic order of a spiral spin component with an incommensurate propagation vector of (0.63, 0.63, 0) was observed at 26 K, while at 14.5 K, the incommensurate conical spin order showed a transition into the fixed commensurate propagation vector of (2/3, 2/3, 0). In addition, two satellite peaks with propagation vectors of (0.035, 0, 0) and (0, 0.035, 0) from the commensurate vector were observed. The widths of these peaks indicate a long-range magnetic order. This new magnetic configuration below 14.5 K may lead to a new model of multiferroic behavior differing from the well-known spin-current model for magnetic ferroelectricity.

引用

页数：5

共 16 条

[1] Spin structure and magnetic frustration in multiferroic RMn2O5 (R=Tb,Ho,Dy) -: art. no. 214402 [J].

Blake, GR ;

Chapon, LC ;

Radaelli, PG ;

Park, S ;

Hur, N ;

Cheong, SW ;

Rodríguez-Carvajal, J .

PHYSICAL REVIEW B, 2005, 71 (21)

[2]

CHEONG SW, 2004, NATURE, V429, P392

[3] Thermally or Magnetically Induced Polarization Reversal in the Multiferroic CoCr2O4 [J].

Choi, Y. J. ;

Okamoto, J. ;

Huang, D. J. ;

Chao, K. S. ;

Lin, H. J. ;

Chen, C. T. ;

van Veenendaal, M. ;

Kaplan, T. A. ;

Cheong, S-W. .

PHYSICAL REVIEW LETTERS, 2009, 102 (06)

[4] DISTANT-NEIGHBOR B-B INTERACTIONS IN COBALT CHROMITE [J].

DWIGHT, K ;

MENYUK, N .

JOURNAL OF APPLIED PHYSICS, 1969, 40 (03) :1156-&

[5] TWO-DIMENSIONAL NEUTRON-DIFFRACTION OF YFE2O4 AND COCR2O4 [J].

FUNAHASHI, S ;

MORII, Y ;

CHILD, HR .

JOURNAL OF APPLIED PHYSICS, 1987, 61 (08) :4114-4116

[6] Spin current and magnetoelectric effect in noncollinear magnets [J].

Katsura, H ;

Nagaosa, N ;

Balatsky, AV .

PHYSICAL REVIEW LETTERS, 2005, 95 (05)

[7] Switching magnetization of a nanoscale ferromagnetic particle using nonlocal spin injection [J].

Kimura, T ;

Otani, Y ;

Hamrle, J .

PHYSICAL REVIEW LETTERS, 2006, 96 (03)

[8] Magnetic control of ferroelectric polarization [J].

Kimura, T ;

Goto, T ;

Shintani, H ;

Ishizaka, K ;

Arima, T ;

Tokura, Y .

NATURE, 2003, 426 (6962) :55-58

[9]

KIMURA T, 2005, PHYS REV B, V7

[10]

L, 2006, PHYS REV B, V74, P24413

← 1 2 →