Exchange-Bias-like Behavior from Disordered Surface Spins in Li4Mn5O12 Nanosticks

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• 作者：Meihua Xu ; Wei Zhong ; Jiangying Yu ; Wencheng Zang ; Chaktong Au ; Zaixing Yang ; Liya Lv ; Youwei Du
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：October 7, 2010
• 年：2010
• 卷：114
• 期：39
• 页码：16143-16147
• 全文大小：247K
• 年卷期：v.114,no.39(October 7, 2010)
• ISSN：1932-7455

文摘

Single-crystalline Li₄Mn₅O₁₂ nanosticks were prepared by a simple method of adding MnSO₄ to molten LiNO₃ and NaNO₃. FESEM and HRTEM investigations revealed that two-dimensional Li₄Mn₅O₁₂ nanosticks were generated in large quantity. The results of dc and ac magnetization as well as magnetic hysteresis measurements suggest spin-glass-like behavior at 9.8 K. Furthermore, an exchange-bias effect is observed over the material in applied magnetic field of H ≤ 5 T.