Electric Polarization Induced by Neel Order without Magnetic Superlattice: Experimental Study of Cu3Mo2O9 and Numerical Study of a Small Spin Cluster

被引：28

作者：

Kuroe, Haruhiko ^{[1
]}

Hosaka, Tomohiro ^{[1
]}

Hachiuma, Suguru ^{[1
]}

Sekine, Tomoyuki ^{[1
]}

Hase, Masashi ^{[2
]}

Oka, Kunihiko ^{[3
]}

Ito, Toshimitsu ^{[3
]}

Eisaki, Hiroshi ^{[3
]}

Fujisawa, Masashi ^{[4
]}

Okubo, Susumu ^{[4
]}

Ohta, Hitoshi ^{[4
]}

机构：

[1] Sophia Univ, Dept Phys, Chiyoda Ku, Tokyo 1028554, Japan

[2] NIMS, Tsukuba, Ibaraki 3050047, Japan

[3] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

[4] Kobe Univ, Mol Photosci Res Ctr, Kobe, Hyogo 6578501, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2011年 / 80卷 / 08期

关键词：

multiferroic materials; frustrating magnet; charge redistribution; Mott insulator; distorted tetrahedral spin system;

D O I：

10.1143/JPSJ.80.083705

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We clarify that the antiferromagnetic order in the distorted tetrahedral quasi-one-dimensional spin system induces electric polarization. In this system, the effects of low dimensionality and magnetic frustration are expected to appear simultaneously. We obtain the magnetic-field-temperature phase diagram of Cu3Mo2O9 by studying the dielectric constant and spontaneous electric polarization. Around the tricritical point at 10 T and 8K, the change in the direction of electric polarization causes a colossal magnetocapacitance. We calculate the charge redistribution in a small spin cluster consisting of two magnetic tetrahedra to demonstrate the electric polarization induced by the antiferromagnetism.

引用

页数：4

共 17 条

[1] Magnetic-field-induced transition in the lattice modulation of colossal magnetoelectric GdMnO3 and TbMnO3 compounds -: art. no. 100102
Arima, T
Goto, T
Yamasaki, Y
Miyasaka, S
Ishii, K
Tsubota, M
Inami, T
Murakami, Y
Tokura, Y
[J]. PHYSICAL REVIEW B, 2005, 72 (10)
[2] Electronic orbital currents and polarization in Mott insulators
Bulaevskii, L. N.
Batista, C. D.
Mostovoy, M. V.
Khomskii, D. I.
[J]. PHYSICAL REVIEW B, 2008, 78 (02)
[3] Multiferroics: a magnetic twist for ferroelectricity
Cheong, Sang-Wook
Mostovoy, Maxim
[J]. NATURE MATERIALS, 2007, 6 (01) : 13 - 20
[4] Ferroelectricity and giant magnetocapacitance in perovskite rare-earth manganites
Goto, T
Kimura, T
Lawes, G
Ramirez, AP
Tokura, Y
[J]. PHYSICAL REVIEW LETTERS, 2004, 92 (25) : 257201 - 1
[5] Effects of magnetic field and pressure on the antiferromagnetic and weak-ferromagnetic orders in tetrahedral spin chain system Cu3Mo2O9
Hamasaki, T.
Kuroe, H.
Sekine, T.
Akaki, M.
Kuwahara, H.
Hase, M.
[J]. INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009), 2010, 200
[6] Successive phase transitions to antiferromagnetic and weak-ferromagnetic long-range order in the quasi-one-dimensional antiferromagnet Cu3Mo2O9
Hamasaki, Tomoaki
Ide, Tomoyuki
Kuroe, Haruhiko
Sekine, Tomoyuki
Hase, Masashi
Tsukada, Ichiro
Sakakibara, Toshiro
[J]. PHYSICAL REVIEW B, 2008, 77 (13)
[7] Enhancement of magnetic frustration caused by Zn doping in quasi-one-dimensional quantum antiferromagnet Cu3Mo2O9
Hase, Masashi
Kitazawa, Hideaki
Ozawa, Kiyoshi
Hamasaki, Tomoaki
Kuroe, Haruhiko
Sekine, Tomoyuki
[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2008, 77 (03)
[8] Spin current and magnetoelectric effect in noncollinear magnets
Katsura, H
Nagaosa, N
Balatsky, AV
[J]. PHYSICAL REVIEW LETTERS, 2005, 95 (05)
[9] Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3 -: art. no. 087206
Kenzelmann, M
Harris, AB
Jonas, S
Broholm, C
Schefer, J
Kim, SB
Zhang, CL
Cheong, SW
Vajk, OP
Lynn, JW
[J]. PHYSICAL REVIEW LETTERS, 2005, 95 (08)
[10] Spin chirality and nontrivial charge dynamics in frustrated Mott insulators: spontaneous currents and charge redistribution
Khomskii, D. I.
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2010, 22 (16)

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