Phase diagram and magnetic relaxation phenomena in Cu2OSeO3

Journal article (2016)

Authors

F. Qian RST/Neutron and Positron Methods in Materials - AS
H. Wilhelm Diamond Light Source
A Aqeel Rijksuniversiteit Groningen
Thomas T.M. Palstra Rijksuniversiteit Groningen
A.J.E. Lefering RST/Fundamental Aspects of Materials and Energy - AS
E.H. Brück RST/Fundamental Aspects of Materials and Energy - AS
C. Pappas RST/Neutron and Positron Methods in Materials - AS
Research Group
RST/Neutron and Positron Methods in Materials (AS) (TU Delft)
Copyright: © 2016 F. Qian, H. Wilhelm, A. Aqeel, T.T.M. Palstra, A.J.E. Lefering, E.H. Brück, C. Pappas
DOI
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https://doi.org/10.1103/PhysRevB.94.064418
More Info
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Published Date

2016

Language

English

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Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Neutron and Positron Methods in Materials

Abstract

We present an investigation of the magnetic-field-temperature phase diagram of Cu2OSeO3 based on dc magnetization and ac susceptibility measurements covering a broad frequency range of four orders of magnitude, from very low frequencies reaching 0.1 Hz up to 1 kHz. The experiments were performed in the vicinity of Tc=58.2 K and around the skyrmion lattice A phase. At the borders between the different phases the characteristic relaxation times reach several milliseconds and the relaxation is nonexponential. Consequently the borders between the different phases depend on the specific criteria and frequency used and an unambiguous determination is not possible.