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.

引用

页码：1 / 9

页数：9

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