| Autor: |
Huangfu S; Laboratory for High Performance Ceramics, Empa, Überlandstrasse 129, Dübendorf CH-8600, Switzerland., Austin AC; Laboratory for High Performance Ceramics, Empa, Überlandstrasse 129, Dübendorf CH-8600, Switzerland.; Centre for Advanced Structural Ceramics, Department of Materials, Imperial College London, London SW7 2AZ, United Kingdom., Guguchia Z; Laboratory for Muon Spin Spectroscopy (LMU), Paul Scherrer Institute (PSI), Forschungsstrasse 111, Villigen CH-5232, Switzerland., Fjellvåg ØS; Laboratory for Neutron Scattering and Imaging (LNS), Paul Scherrer Institute (PSI), Forschungsstrasse 111, Villigen CH-5232, Switzerland.; Department for Hydrogen Technology, Institute for Energy Technology, Kjeller NO-2027, Norway., Knorpp AJ; Laboratory for High Performance Ceramics, Empa, Überlandstrasse 129, Dübendorf CH-8600, Switzerland., Luetkens H; Laboratory for Muon Spin Spectroscopy (LMU), Paul Scherrer Institute (PSI), Forschungsstrasse 111, Villigen CH-5232, Switzerland., Schilling A; Department of Physics, University of Zurich, Winterthurerstrasse 190, Zurich CH-8057, Switzerland., Stuer M; Laboratory for High Performance Ceramics, Empa, Überlandstrasse 129, Dübendorf CH-8600, Switzerland. |
| Abstrakt: |
To elucidate the impact of a high entropy elemental distribution of the lattice site on the magnetic properties in oxide compounds, a series of complex perovskites Ba B O 3 ( B = Y, Fe, Ti, Zr, Hf, Nb, and Ta) with different Fe content ratios (0, 0.2, 0.3, and 0.4) have been synthesized and thoroughly characterized. In this complex oxide series, superconducting quantum interference device magnetometry reveals a gradual change of a well-defined magnetic phase transition and B-site magnetic moment, which correlates with the Fe content. More importantly, a comprehensive analysis of the sample with a 0.4-Fe content (40% on the B-site) including magnetization, heat capacity, neutron diffraction, and muon-spin rotation measurements suggests that in the low-temperature state, a short-range antiferromagnetic correlation may exist, which could result from the magnetic interaction of Fe ions and consequent redistribution of associated d-electrons. |
