Crystal growth, structure and magnetic properties of Ca10Cr7O28

被引：20

作者：

Balz, Christian ^{[1
,2
,3
]}

Lake, Bella ^{[1
,2
]}

Reehuis, Manfred ^{[1
]}

Islam, A. T. M. Nazmul ^{[1
]}

Prokhnenko, Oleksandr ^{[1
]}

Singh, Yogesh ^{[4
]}

Pattison, Philip ^{[5
]}

Toth, Sandor ^{[6
]}

机构：

[1] Helmholtz Zentrum Berlin Mat & Energie, D-14109 Berlin, Germany

[2] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany

[3] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA

[4] Indian Inst Sci Educ & Res IISER Mohali, Sect 81, Mohali 140306, India

[5] European Synchrotron Radiat Facil, Swiss Norwegian Beam Lines, 71 Ave Martyrs, F-38043 Grenoble 9, France

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

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2017年 / 29卷 / 22期

关键词：

quantum spin liquid; crystal structure; mixed valence; CHROMIUM;

D O I：

10.1088/1361-648X/aa68eb

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A detailed diffraction study of Ca10Cr7O28 is presented which adds significant new insights into the structural and magnetic properties of this compound. A new crystal structure type was used where the a and b axes are doubled compared to previous models providing a more plausible structure where all crystallographic sites are fully occupied. The presence of two different valences of chromium was verified and the locations of the magnetic Cr5+ and nonmagnetic Cr6+ ions were identified. The Cr5+ ions have spin-1/2 and form distorted kagome bilayers which are stacked in an ABC arrangement along the c axis. These results lay the foundation for understanding of the quantum spin liquid behavior in Ca10Cr7O28 which has recently been reported in Balz et al (2016 Nat. Phys. 12 942).

引用

页数：10

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