Affordable Access

Publisher Website

muSR investigation of magnetism and magnetoelectric coupling in Cu2OSeO3

Authors
  • Maisuradze, A.
  • Guguchia, Z.
  • Graneli, B.
  • Ronnow, H. M.
  • Berger, H.
  • Keller, H.
Type
Preprint
Publication Date
May 05, 2011
Submission Date
May 05, 2011
Identifiers
DOI: 10.1103/PhysRevB.84.064433
Source
arXiv
License
Yellow
External links

Abstract

A detailed zero and transverse field (ZF&TF) muon spin rotation (muSR) investigation of magnetism and the magneto-electric coupling in Cu2OSeO3 is reported. An internal magnetic field B_int(T=0) = 85.37(25) mT was found, in agreement with a ferrimagnetic state below Tc = 57.0(1) K. The temperature dependence of the magnetic order parameter is well described by the relation B_int = B(0)(1-(T/Tc)^2)^b with an effective exponent b = 0.39(1) which is close to the critical exponent B ~ 1/3 for a three dimensional (3D) magnetic system. Just above Tc the muon relaxation rate follows the power low \lambda (T)\propto (T/Tc - 1)^\omega with \omega = 1.06(9), which is characteristic for 3D ferromagnets. Measurements of B_int(T) with and without an applied electrostatic field E = 1.66 x 10^5 V/m suggest a possible electric field effect of magnitude \Delta Bv = Bv(0 V)-Bv(500 V) = - 0.4(4) mT.

Report this publication

Statistics

Seen <100 times