Critical behavior of the magnetization in the spin-gapped system NiCl2-4SC (NH2)2

被引：5

作者：

Paduan-Filho, A. ^{[1
]}

Al-Hassanieh, K. A. ^{[2
]}

Sengupta, P. ^{[2
,3
]}

Zapf, V. S. ^{[3
]}

Jaime, M. ^{[3
]}

Lacerda, A. ^{[3
]}

Kenzelmann, M. ^{[4
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, Brazil

[2] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[3] Los Alamos Natl Lab, MPA NHMFL, Los Alamos, NM 87545 USA

[4] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 07期

基金：

巴西圣保罗研究基金会; 美国国家科学基金会;

关键词：

BOSE-EINSTEIN CONDENSATION; MAGNONS;

D O I：

10.1063/1.3055265

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report accurate magnetization measurements on the spin-gap compound NiCl2-4SC (NH2)(2) around the low portion of the magnetic induced phase ordering. The critical density of the magnetization at the phase boundary is analyzed in terms of a Bose-Einstein condensation (BEC) of bosonic particles, and the boson interaction strength is obtained as upsilon(0)=0.61 meV. The detailed analysis of the magnetization data across the transition leads to the conclusion for the preservation of the U(1) symmetry, as required for BEC. (c) 2009 American Institute of Physics. [DOI: 10.1063/1.3055265]

引用

页数：3

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