Competing magnetic phases on a kagome staircase

被引:140
作者
Lawes, G
Kenzelmann, M
Rogado, N
Kim, KH
Jorge, GA
Cava, RJ
Aharony, A
Entin-Wohlman, O
Harris, AB
Yildirim, T
Huang, QZ
Park, S
Broholm, C
Ramirez, AP
机构
[1] Los Alamos Natl Lab, Los Alamos, NM 87544 USA
[2] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
[3] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA
[4] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA
[5] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08544 USA
[6] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
[7] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[8] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA
[9] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevLett.93.247201
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present thermodynamic and neutron data on Ni3V2O8, a spin-1 system on a kagome staircase. The extreme degeneracy of the kagome antiferromagnet is lifted to produce two incommensurate phases at finite T-one amplitude modulated, the other helical-plus a commensurate canted antiferromagnet for T-->0. The H-T phase diagram is described by a model of competing first and second neighbor interactions with smaller anisotropic terms. Ni3V2O8 thus provides an elegant example of order from subleading interactions in a highly frustrated system.
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页数:4
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