An investigation of phase separation by magnetic force microscopy in La0.45Sr0.55MnO3-δ (δ approximately equals 0.01)

作者：Li Run Wei; Zhang Zhen Rong; Li Qing An; Sun Ji Rong; Wang Zhi Hong; Zhang Shao Ying; Cheng Zhao Hua; Han Bao Shan; Shen Bao Gen

来源：Chinese Physics, 2002, 11(3): 288-292.

DOI：10.1088/1009-1963/11/3/317

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 Neel 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.

• 出版日期2002