Unusually Large Magnetic Anisotropy in a CuO-Based Semiconductor Cu5V2O10

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• 作者：Zhangzhen He ; Chensheng Lin ; Wendan Cheng ; Atsushi Okazawa ; Norimichi Kojima ; Jun-ichi Yamaura ; Yutaka Ueda
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：February 9, 2011
• 年：2011
• 卷：133
• 期：5
• 页码：1298-1300
• 全文大小：710K
• 年卷期：v.133,no.5(February 9, 2011)
• ISSN：1520-5126

文摘

A CuO-based material Cu₅V₂O₁₀ was successfully grown in a closed crucible using Sr(OH)₂路8H₂O as flux. The structure of Cu₅V₂O₁₀ can be viewed as being composed of two types of zigzag Cu鈭扥 chains running along the b- and c-axes, which shows a two-dimensional crosslike framework with 12-column square tunnels along the a-axis. Magnetic measurements show that Cu₅V₂O₁₀ exhibits unexpected large magnetic anisotropy, which is the first time magnetic anisotropy energy of 10⁷ erg/cm³ in the CuO-based materials has been observed. The origins of large anisotropy are suggested to arise from strong anisotropic exchanges due to the particular bonding geometry and the Jahn鈭扵eller distortion of Cu²⁺ ions. Further, the band structure investigated by the GGA+U method suggests that Cu₅V₂O₁₀ is a semiconductor.