| An investigation of phase separation by magnetic force microscopy in La0.45Sr0.55MnO3-δ(δ≈0.01) |
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| 引用本文： | 李润伟,张臻蓉,李庆安,孙继荣,王志宏,张绍英,成昭华,韩宝善,沈保根. An investigation of phase separation by magnetic force microscopy in La0.45Sr0.55MnO3-δ(δ≈0.01)[J]. 中国物理, 2002, 11(3): 288-292 |
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| 作者姓名： | 李润伟 张臻蓉 李庆安 孙继荣 王志宏 张绍英 成昭华 韩宝善 沈保根 |
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| 作者单位： | State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 10074081) and State Key Project of Fundamental Research of China (Grant No G1998061310). |
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| 摘 要： | We have found phase separation in La0.45Sr0.55MnO3-δ (LSMO) by means of electron spin resonance, magnetic force microscopy (MFM) and magnetic measurements. Ferromagnetic and antiferromagnetic phases can coexist at low temperatures, and ferromagnetic and paramagnetic phases coexist when the temperature lies between the Néel and Curie temperatures. The size and shape of the ferromagnetic phases (the minority phases) was first observed directly from MFM images. It is suggested that the phase separation in LSMO is not the charge segregation type, but an electroneutral type due perhaps to the nonuniform distribution of oxygen vacancies.
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| 关 键 词： | 晶体 LSMO 相分离 铁磁簇 |
| 收稿时间： | 2001-10-19 |
An investigation of phase separation by magnetic force microscopy in La0.45Sr0.55MnO3-δ(δ≈0.01) |
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| Li Run-Wei,Zhang Zhen-Rong,Li Qing-An,Sun Ji-Rong,Wang Zhi-Hong,Zhang Shao-Ying,Cheng Zhao-Hu,Han Bao-Shan and Shen Bao-Gen. An investigation of phase separation by magnetic force microscopy in La0.45Sr0.55MnO3-δ(δ≈0.01)[J]. Chinese Physics, 2002, 11(3): 288-292 |
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| Authors: | Li Run-Wei Zhang Zhen-Rong Li Qing-An Sun Ji-Rong Wang Zhi-Hong Zhang Shao-Ying Cheng Zhao-Hu Han Bao-Shan Shen Bao-Gen |
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| Affiliation: | State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | We have found phase separation in La0.45Sr0.55MnO3-δ (LSMO) by means of electron spin resonance, magnetic force microscopy (MFM) and magnetic measurements. Ferromagnetic and antiferromagnetic phases can coexist at low temperatures, and ferromagnetic and paramagnetic phases coexist when the temperature lies between the Néel and Curie temperatures. The size and shape of the ferromagnetic phases (the minority phases) was first observed directly from MFM images. It is suggested that the phase separation in LSMO is not the charge segregation type, but an electroneutral type due perhaps to the nonuniform distribution of oxygen vacancies. |
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| Keywords: | ferromagnetic cluster phase separation |
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