Study on the Interaction between Magnetism and Structure in Cr₀.₉₃V₀.₈₇O₃

Chun-Chuen Yang^1*, Yu-Hsien Lin², Chin-Wei Wang³, Chia-Chi Lu², Ming-Hsuan Liao², Yu-Ting Lee²

¹Department of Physics, National Central University, Zhongli, Taoyuan, Taiwan
²Department of Physics, Chung Yuan Christian University, Zhongli, Taoyuan, Taiwan
³Neutron Group, National Synchrotron Radiation Research Center, Hsinchu, Taiwan

* Presenter:Chun-Chuen Yang, email:chunchuenyang@ncu.edu.tw

This study investigates the interaction between magnetism and structure in Cr₀.₉₃V₀.₈₇O₃. Utilizing techniques such as X-ray diffraction, neutron diffraction, Raman spectroscopy, and physical property measurement systems, the crystal structure and magnetic behavior of the material were analyzed in detail. The results show that Cr₀.₉₃V₀.₈₇O₃ consists of approximately 50 nm nanosphere particles and maintains a trigonal R-3c structure from 6 K to 350 K, with no significant structural phase transitions observed. Neutron diffraction experiments reveal antiferromagnetic ordering along the c-axis from 6 K to 150 K, with the magnetic moment strength decreasing from 1.31 μB/atom as the temperature rises, following the Bloch T³/² law. Above 150 K, the material retains antiferromagnetic ordering along the c-axis, but the magnetic moment reduces to approximately 0.42 μB/atom and remains stable up to 400 K.

At 2.5 K, the material exhibits significant magnetic hysteresis, which diminishes as the temperature increases, with the hysteresis area and magnetic energy product nearing zero around 120 K. This indicates that large-scale magnetic domains are only present below 150 K. These characteristics suggest that CrVO₃ series materials have potential for applications in magnetic energy storage, magnetic sensors, and spintronics.

Keywords: CrVO₃ , magnetic ordering, neutron scattering