2016/11/18 by Fengjiao Qian, F. Qian, H. Wilhelm +14
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1611.06014
8 pages, 7 figures
arxiv created 2016/11/18 · openalex publication_date 2016/11/18 · arxiv updated 2016/11/21 · openalex created_date 2016/11/30 · openalex updated_date 2026/07/28
The magnetic phase diagram of the chiral magnet Cu2OSeO3 has been investigated by dc magnetisation and ac susceptibility over a very large frequency range from 0.1 Hz up to 1 kHz and temperatures below 50 K. Qualitatively different phase diagrams have been obtained by applying the magnetic field along the easy ⟨100⟩ or the hard ⟨110⟩ crystallographic directions. Strong χ" appears close to Bc2, but only below 30 K and is more pronounced when B is applied along ⟨100⟩. In addition, the transition from the helical to the conical phase leads to two adjacent Bc1 lines below 50 K. The frequency dependence of χ" indicates the existence of very broad distributions of relaxation times both at Bc1 and Bc2. The associated very long characteristic times eventually prevent the system from reaching thermal equilibrium at low temperatures and lead to thermal hysteresis.