Large easy-axis anisotropy in the one-dimensional magnet BaMo(PO4)2

被引：14

作者：

Abdeldaim, Aly H. ^{[1
,2
,3
,4
]}

Badrtdinov, Danis, I ^{[5
]}

Gibbs, Alexandra S. ^{[4
]}

Manuel, Pascal ^{[4
]}

Walker, Helen C. ^{[4
]}

Manh Duc Le ^{[4
]}

Wu, Chien Hung ^{[4
]}

Wardecki, Dariusz ^{[1
]}

Eriksson, Sten-Gunnar ^{[1
]}

Kvashnin, Yaroslav O. ^{[6
]}

Tsirlin, Alexander A. ^{[5
,7
]}

Nilsen, Goran J. ^{[4
]}

机构：

[1] Chalmers Univ Technol, Dept Chem & Chem Engn, Energy & Mat, SE-41296 Gothenburg, Sweden

[2] Univ Liverpool, Dept Chem, 51 Oxford St, Oxford L7 3NY, Merseyside, England

[3] Univ Liverpool, Mat Innovat Factory, 51 Oxford St, Oxford L7 3NY, Merseyside, England

[4] Sci & Technol Facil Council, ISIS Neutron & Muon Source, Didcot OX11 0QX, Oxon, England

[5] Ural Fed Univ, Theoret Phys & Appl Math Dept, Ekaterinburg 620002, Russia

[6] Uppsala Univ, Dept Phys & Astron, POB 516, S-75120 Uppsala, Sweden

[7] Univ Augsburg, Inst Phys, Ctr Elect Correlat & Magnetism, Expt Phys 6, D-86135 Augsburg, Germany

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 21期

基金：

英国科学技术设施理事会;

关键词：

HALDANE-GAP; SPIN DYNAMICS; CRYSTAL;

D O I：

10.1103/PhysRevB.100.214427

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present an extensive experimental and theoretical study on the low-temperature magnetic properties of the monoclinic anhydrous alum compound BaMo(PO4)(2). The magnetic susceptibility reveals strong antiferromagnetic interactions theta(CW) = -167 K and long-range magnetic order at T-N = 22 K, in agreement with a recent report. Powder neutron diffraction furthermore shows that the order is collinear, with the moments near the ac plane. Neutron spectroscopy reveals a large excitation gap Delta = 15 meV in the low-temperature ordered phase, suggesting a much larger easy-axis spin anisotropy than anticipated. However, the large anisotropy justifies the relatively high ordered moment, Neel temperature, and collinear order observed experimentally and is furthermore reproduced in a first-principles calculations by using a new computational scheme. We therefore propose BaMo(PO4)(2) to host S = 1 antiferromagnetic chains with large easy-axis anisotropy, which has been theoretically predicted to realize novel excitation continua.

引用

页数：10

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