113學年材料所-第十三週 專題研討課程 演講公告 (114年5月15日)
2025.05.08
演講題目:
Investigation of the Complex Magnetic Behavior of the Spinel Material Fe₃V₃O₈
演講者: 楊仲準教授(Prof. Chun-Chuen Yang)
現職: 國立中央大學 物理系 教授
時間: 114年05月15日(四) 下午15:20~17:10
地點: 成功大學成功校區三系館 鋼構區(3F)共同教室A1302演講廳
內容摘要:
Spinel materials composed of transition metal oxides with 3d electrons possess significant potential for applications related to their structural, magnetic, and electronic properties. They have attracted extensive attention, research, and practical application in both the materials science community and industry. The crystal and magnetic structures of Fe₃V₃O₈ exhibit tetragonal I4₁/amd and I4₁/am'd' symmetries, respectively, across the temperature range of 1.5 K to 475 K. Magnetic correlations are observed to initiate above 475 K. Below 150 K, Fe₃V₃O₈ adopts a canted antiferromagnetic structure, while above 300 K, it transitions to a ferromagnetic phase. In the intermediate temperature range, large magnetic domains associated with spin reversal of the A-site ions evolve into smaller domains, producing spin glass-like behavior in the AC susceptibility. A spin-orbit coupling-induced energy gap of 6.8 meV is consistently present between 1.5 K and 300 K. Despite these findings, the intricate interactions among charge, orbital, and spin degrees of freedom in Fe₃V₃O₈ remain not fully understood.
歡迎各位撥冗參加!!
Investigation of the Complex Magnetic Behavior of the Spinel Material Fe₃V₃O₈
演講者: 楊仲準教授(Prof. Chun-Chuen Yang)
現職: 國立中央大學 物理系 教授
時間: 114年05月15日(四) 下午15:20~17:10
地點: 成功大學成功校區三系館 鋼構區(3F)共同教室A1302演講廳
內容摘要:
Spinel materials composed of transition metal oxides with 3d electrons possess significant potential for applications related to their structural, magnetic, and electronic properties. They have attracted extensive attention, research, and practical application in both the materials science community and industry. The crystal and magnetic structures of Fe₃V₃O₈ exhibit tetragonal I4₁/amd and I4₁/am'd' symmetries, respectively, across the temperature range of 1.5 K to 475 K. Magnetic correlations are observed to initiate above 475 K. Below 150 K, Fe₃V₃O₈ adopts a canted antiferromagnetic structure, while above 300 K, it transitions to a ferromagnetic phase. In the intermediate temperature range, large magnetic domains associated with spin reversal of the A-site ions evolve into smaller domains, producing spin glass-like behavior in the AC susceptibility. A spin-orbit coupling-induced energy gap of 6.8 meV is consistently present between 1.5 K and 300 K. Despite these findings, the intricate interactions among charge, orbital, and spin degrees of freedom in Fe₃V₃O₈ remain not fully understood.
歡迎各位撥冗參加!!