Candidate quantum spin ice in the pyrochlore Pr2Hf2O7

被引：57

作者：

Sibille, Romain ^{[1
]}

Lhotel, Elsa ^{[2
,3
]}

Hatnean, Monica Ciomaga ^{[4
]}

Balakrishnan, Geetha ^{[4
]}

Fak, Bjorn ^{[5
]}

Gauthier, Nicolas ^{[1
]}

Fennell, Tom ^{[6
]}

Kenzelmann, Michel ^{[1
]}

机构：

[1] Paul Scherrer Inst, Lab Sci Dev & Novel Mat, CH-5232 Villigen, Switzerland

[2] CNRS, Inst Neel, BP 166, F-38042 Grenoble 9, France

[3] Univ Grenoble 1, BP 166, F-38042 Grenoble 9, France

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

[5] Inst Laue Langevin, CS 20156, F-38042 Grenoble 9, France

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

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 02期

基金：

英国工程与自然科学研究理事会; 瑞士国家科学基金会;

关键词：

COULOMB PHASE; TRANSITION; OXIDES; LIQUID; STATE; ORDER; FIELD;

D O I：

10.1103/PhysRevB.94.024436

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the low temperature magnetic properties of the pyrochlore Pr2Hf2O7. Polycrystalline and single-crystal samples are investigated using time-of-flight neutron spectroscopy and macroscopic measurements, respectively. The crystal-field splitting produces a non-Kramers doublet ground state for Pr3+, with Ising-like anisotropy. Below 0.5 K ferromagnetic correlations develop, which suggests that the system enters a spin-ice-like state associated with the metamagnetic behavior observed at mu H-0(c) similar to 2.4 T. In this regime, the development of a discrete inelastic excitation in the neutron spectra indicates the appearance of spin dynamics that are likely related to cooperative quantum fluctuations.

引用

页数：7

共 56 条

[1] Demagnetizing factors for rectangular ferromagnetic prisms [J].

Aharoni, A .

JOURNAL OF APPLIED PHYSICS, 1998, 83 (06) :3432-3434

[2] Observation of long-range magnetic ordering in pyrohafnate Nd2Hf2O7: A neutron diffraction study [J].

Anand, V. K. ;

Bera, A. K. ;

Xu, J. ;

Herrmannsdoerfer, T. ;

Ritter, C. ;

Lake, B. .

PHYSICAL REVIEW B, 2015, 92 (18)

[3] Vindication of Yb2Ti2O7 as a Model Exchange Quantum Spin Ice [J].

Applegate, R. ;

Hayre, N. R. ;

Singh, R. R. P. ;

Lin, T. ;

Day, A. G. R. ;

Gingras, M. J. P. .

PHYSICAL REVIEW LETTERS, 2012, 109 (09)

[4] Spin liquids in frustrated magnets [J].

Balents, Leon .

NATURE, 2010, 464 (7286) :199-208

[5] Seeing the light: Experimental signatures of emergent electromagnetism in a quantum spin ice [J].

Benton, Owen ;

Sikora, Olga ;

Shannon, Nic .

PHYSICAL REVIEW B, 2012, 86 (07)

[6] Investigating the Local Structure of Lanthanoid Hafnates Ln2Hf2O7 via Diffraction and Spectroscopy [J].

Blanchard, Peter E. R. ;

Liu, Sam ;

Kennedy, Brendan J. ;

Ling, Chris D. ;

Avdeev, Max ;

Aitken, Jade B. ;

Cowie, Bruce C. C. ;

Tadich, Anton .

JOURNAL OF PHYSICAL CHEMISTRY C, 2013, 117 (05) :2266-2273

[7]

Boothroyd A. T., 1990, SPECTRE PROGRAM CALC

[8] CRYSTAL-FIELD EXCITATIONS IN ND2CUO4, PR2CUO4, AND RELATED N-TYPE SUPERCONDUCTORS [J].

BOOTHROYD, AT ;

DOYLE, SM ;

PAUL, DM ;

OSBORN, R .

PHYSICAL REVIEW B, 1992, 45 (17) :10075-10086

[9] Spin ice state in frustrated magnetic pyrochlore materials [J].

Bramwell, ST ;

Gingras, MJP .

SCIENCE, 2001, 294 (5546) :1495-1501

[10] Frustration in Ising-type spin models on the pyrochlore lattice [J].

Bramwell, ST ;

Harris, MJ .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (14) :L215-L220

← 1 2 3 4 5 6 →