Fluctuations and All-In-All-Out Ordering in Dipole-Octupole Nd2Zr2O7

被引：86

作者：

Lhotel, E. ^{[1
]}

Petit, S. ^{[2
]}

Guitteny, S. ^{[2
]}

Florea, O. ^{[1
]}

Hatnean, M. Ciomaga ^{[3
]}

Colin, C. ^{[1
,6
]}

Ressouche, E. ^{[4
,5
]}

Lees, M. R. ^{[3
]}

Balakrishnan, G. ^{[3
]}

机构：

[1] CNRS, Inst NEEL, F-38000 Grenoble, France

[2] CEA Saclay, CEA CNRS UMR 12, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[3] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[4] CEA Grenoble, INAC SPSMS, F-38000 Grenoble, France

[5] Univ Grenoble 1, F-38000 Grenoble, France

[6] Univ Grenoble Alpes, Inst NEEL, F-38000 Grenoble, France

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 19期

基金：

英国工程与自然科学研究理事会;

关键词：

PYROCHLORE; FRUSTRATION;

D O I：

10.1103/PhysRevLett.115.197202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By means of neutron scattering and magnetization measurements down to 90 mK, we determine the magnetic ground state of the spin-ice candidate Nd2Zr2O7. We show that, despite ferromagnetic interactions, Nd2Zr2O7 undergoes a transition around 285 mK towards an all-in-all-out antiferromagnetic state, with a strongly reduced ordered magnetic moment. We establish the (H, T) phase diagram in the three directions of the applied field and reveal a metamagnetic transition around 0.1 T, associated with an unexpected shape of the magnetization curves. We propose that this behavior results from the peculiar nature of the Nd3+ doublet, a dipolar-octupolar doublet, different from the standard Kramers doublet studied to date, thus revealing the importance of multipolar correlations in the properties of pyrochlore oxides.

引用

页数：5

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