Microscopic magnetic nature of K2NiF4-type 3d transition metal oxides

13th International Conference on Muon Spin Rotation, Relaxation and Resonance

Sugiyama, J.^1,2 ; Nozaki, H.^1 ; Umegaki, I.^1 ; Higemoto, W.^2 ; Ansaldo, E.J.^3 ; Brewer, J.H.^3,4 ; Sakurai, H.^5 ; Kao, T.-H.^5,6 ; Yang, H.-D.^6 ; Månsson, M.^7,8

Toyota Central Research and Development Laboratories, Inc., 41-1 Yokomichi, Nagakute, Aichi

480-1192, Japan^1

Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki

319-1195, Japan^2

TRIUMF, 4004 Wesbrook Mall, Vancouver

BC

V6T 2A3, Canada^3

Department of Physics and Astronomy, University of British Columbia, Vancouver

BC

V6T 1Z1, Canada^4

National Institute for Materials Science, Tsukuba, Ibaraki

305-0044, Japan^5

Department of Physics, National Sun Yat-Sen University, Kaohsiung

804, Taiwan^6

Laboratory for Quantum Magnetism, Ecole Polytechnique Federale de Lausanne, CH-1015, Switzerland^7

Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, Villigen PSI

CH-5232, Switzerland^8

关键词: 3d transition metals;    Antiferromagnetic orderings;    Antiferromagnetics;    Localized magnetic moments;    Long range orders;    Magnetic nature;    Ordering phase;    Powder samples;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/551/1/012011/pdf
DOI  :  10.1088/1742-6596/551/1/012011

来源: IOP

【 摘 要 】

In order to elucidate the magnetic nature of K2NiF4-type 3d transition metal oxides, we have measured μ+SR spectra for Sr2VO4, LaSrVO4, and Sr2CrO4 using powder samples. ZF- and wTF-μ+SR measurements propose that Sr2VO4 enters into the static antiferromagnetic (AF) order phase below 8 K. In addition, TF-μ+SR measurements evidence that the transition at 105 K is not magnetic but structural and/or electronic in origin. For LaSrVO4, static long-range order has not been observed down to 20 K, while, as T decreases from 145 K, wTF asymmetry starts to decrease below 60 K, suggesting the appearance and evolution of localized magnetic moments below 60 K. For Sr2CrO4, by contrast, both ZF- and wTF-μ+SR have confirmed the presence of antiferromagnetic order below 117 K, as predicted in the χ(T) curve.