17O NMR study of the triangular lattice antiferromagnet CuCrO2

被引：6
|
作者：
Ogloblichev, Vasily V. [1 ,2 ,3 ]
Smolnikov, Alexey G. [1 ]
Sadykov, Almaz F. [1 ]
Piskunov, Yuri V. [1 ]
Gerashenko, Alexander P. [1 ]
Furukawa, Yuji [2 ,3 ]
Kumagai, Ken-ichi [3 ]
Yakubovsky, Andrey Yu. [4 ]
Mikhalev, Konstantin N. [1 ]
Barilo, Sergei N. [5 ]
Shiryaev, Sergei V. [5 ]
Belozerov, Alexander S. [1 ]
机构：
[1] Russian Acad Sci, Ural Branch, MN Mikheev Inst Met Phys, 18 S Kovalevskaya St, Ekaterinburg 620108, Russia
[2] Iowa State Univ, Dept Phys & Astron, Ames Lab, Ames, IA 50011 USA
[3] Hokkaido Univ, Fac Sci, Dept Phys, Sapporo, Hokkaido 0600810, Japan
[4] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia
[5] Natl Acad Sci Belarus, Inst Solid State Phys & Semicond, Minsk 220072, BELARUS
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2018年 / 458卷
基金：
俄罗斯科学基金会;
关键词：
O-17; NMR; Electric field gradient; Frustrated systems; Helicoidal magnetic structure; SPIN; RESONANCE;
D O I：
10.1016/j.jmmm.2018.02.080
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The single crystalline and powder samples of multiferroic CuCrO2 have been investigated by O-17 NMR techniques in the paramagnetic and magnetically ordered states. The unusual negative hyperfine field on oxygen nuclei, H-hf = -5.2 kOe/mu B, has been determined in paramagnetic state. The O-17 NMR spectrum in ordered state has a shape typical for incommensurate magnetic structure. It can be well described taking into account only dipole fields which are produced by Cr3+- ions with magnetic moment mu = 2.2 mu(B). The parameters of the EFG (electric field gradient) tensor - the quadrupole frequency (upsilon(Q)) and the asymmetry parameter, have been determined. The value of upsilon(Q) increases monotonously with decreasing temperature in the range 90 K > T > 1.5 K. The estimates of the population of the ligands p - orbitals have been obtained. (C) 2018 Elsevier B.V. All rights reserved.
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页码：1 / 9
页数：9
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