Magnetodielectric detection of magnetic quadrupole order in Ba(TiO)Cu4(PO4)4 with Cu4O12 square cupolas

被引：43

作者：

Kimura, K. ^{[1
]}

Babkevich, P. ^{[2
]}

Sera, M. ^{[1
]}

Toyoda, M. ^{[3
]}

Yamauchi, K. ^{[4
]}

Tucker, G. S. ^{[2
,5
]}

Martius, J. ^{[2
]}

Fennell, T. ^{[5
]}

Manuel, P. ^{[6
]}

Khalyavin, D. D. ^{[6
]}

Johnson, R. D. ^{[6
]}

Nakano, T. ^{[7
]}

Nozue, Y. ^{[7
]}

Ronnow, H. M. ^{[2
]}

Kimura, T. ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Div Mat Phys, Toyonaka, Osaka 5608531, Japan

[2] Ecole Polytech Fed Lausanne, Lab Quantum Magnetism, Inst Phys, CH-1015 Lausanne, Switzerland

[3] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528550, Japan

[4] Osaka Univ, ISIR SANKEN, Ibaraki 5670047, Japan

[5] Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland

[6] STFC Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[7] Osaka Univ, Grad Sch Sci, Dept Phys, Toyonaka, Osaka 5600043, Japan

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

基金：

欧洲研究理事会; 瑞士国家科学基金会; 英国科学技术设施理事会;

关键词：

BILBAO CRYSTALLOGRAPHIC SERVER; INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; STATE; OXIDE;

D O I：

10.1038/ncomms13039

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：

In vortex-like spin arrangements, multiple spins can combine into emergent multipole moments. Such multipole moments have broken space-inversion and time-reversal symmetries, and can therefore exhibit linear magnetoelectric (ME) activity. Three types of such multipole moments are known: toroidal; monopole; and quadrupole moments. So far, however, the ME activity of these multipole moments has only been established experimentally for the toroidal moment. Here we propose a magnetic square cupola cluster, in which four corner-sharing square-coordinated metal-ligand fragments form a noncoplanar buckled structure, as a promising structural unit that carries an ME-active multipole moment. We substantiate this idea by observing clear magnetodielectric signals associated with an antiferroic ME-active magnetic quadrupole order in the real material Ba(TiO)Cu-4(PO4)(4). The present result serves as a useful guide for exploring and designing new ME-active materials based on vortex-like spin arrangements.

引用

页数：7

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