One Dimensional(1D)-to-2D Crossover of Spin Correlations in the 3D Magnet ZnMn2O4

被引：13

作者：

Disseler, S. M. ^{[1
]}

Chen, Y. ^{[1
,2
]}

Yeo, S. ^{[3
,4
,6
]}

Gasparovic, G. ^{[1
,2
]}

Piccoli, P. M. B. ^{[5
]}

Schultz, A. J. ^{[5
]}

Qiu, Y. ^{[1
,2
]}

Huang, Q. ^{[1
]}

Cheong, S. -W. ^{[3
,4
]}

Ratcliff, W., II ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[2] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[3] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA

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

[5] Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA

[6] Korea Atom Energy Res Inst, Daejeon, South Korea

来源：

SCIENTIFIC REPORTS | 2015年 / 5卷

基金：

美国国家科学基金会;

关键词：

NEUTRON-SCATTERING; MODEL; ORDER;

D O I：

10.1038/srep17771

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We report on the intriguing evolution of the dynamical spin correlations of the frustrated spinel ZnMn2O4. Inelastic neutron scattering and magnetization studies reveal that the dynamical correlations at high temperatures are 1D. At lower temperature, these dynamical correlations become 2D. Surprisingly, the dynamical correlations condense into a quasi 2D Ising-like ordered state, making this a rare observation of two dimensional order on the spinel lattice. Remarkably, 3D ordering is not observed down to temperatures as low as 300 mK. This unprecedented dimensional crossover stems from frustrated exchange couplings due to the huge Jahn-Teller distortions around Mn3+ ions on the spinel lattice.

引用

页数：9

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