Destruction of charge ordering phase in La0.4Ca0.6MnO3 induced by low Cr doping

稀有金属（英文版）, 2011, 30(3): 241-246. doi: 10.1007/s12598-011-0375-5

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Anhui Key Laboratory of Spintronic and Nanometric Materials Cultivating Base, Suzhon College, Suzhou 234000, China ;Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China

2.Anhui Key Laboratory of Spintronic and Nanometric Materials Cultivating Base, Suzhon College, Suzhou 234000, China ;Department of Electronics and Electric Engineering, Suzhou College, Suzhou 234000, China

3.Anhui Key Laboratory of Spintronic and Nanometric Materials Cultivating Base, Suzhon College, Suzhou 234000, China ;Department of Electronics and Electric Engineering, Suzhou College, Suzhou 234000, China

4.Anhui Key Laboratory of Spintronic and Nanometric Materials Cultivating Base, Suzhon College, Suzhou 234000, China ;Department of Electronics and Electric Engineering, Suzhou College, Suzhou 234000, China

5.Anhui Key Laboratory of Spintronic and Nanometric Materials Cultivating Base, Suzhon College, Suzhou 234000, China ;Department of Electronics and Electric Engineering, Suzhou College, Suzhou 234000, China

6.Anhui Key Laboratory of Spintronic and Nanometric Materials Cultivating Base, Suzhon College, Suzhou 234000, China ;Department of Electronics and Electric Engineering, Suzhou College, Suzhou 234000, China

基金项目: the Natural Science Research Programs of Anhui Education Department,China(KJ2010B229;KJ2010B228;KJ2009B281Z) the Key Program of the National Natural Science Foundation of China(19934003) the Key Program of Natural Science Research of Anhui Education Department(KJ2011A259;KJ2008A34ZC)

Destruction of charge ordering phase in La0.4Ca0.6MnO3 induced by low Cr doping

PENG Zhensheng ^1, , YANG Gang ^2, , WANG Guiying ^3, , TANG Yonggang ^4, , GUO Huanyin ^5, , MAO Qianga ^6,

Keywords： perovskite manganite

Polycrystalline samples of La<0.4>Ca<,0.6>Mn<,1-x>Cr<,x>O<,3> (x = 0.00, 0.02, 0.04, 0.06) were prepared by the solid state reaction method. The influence of Cr<'3+> substitution for Mn<'3+> on the magnetic property and charge ordering phase of La<0.4>Ca<,0.6>MnO<,3> was studied through the measurements of X-ray diffraction (XRD), magnetization-temperature (M-T) curves and electron spin resonance (ESR) spectra. The experimental results indicate that the mother's body of La<,0.4>Ca<,0.6>MnO<,3> has very complicated magnetic structure, exhibits charge ordering phase at 258 K, and shows long-range strongly correlated charge ordering-antiferromagnetism (CO-AFM) phase from 175 to 50 K.Spin glass state appears when the tempereature decreases to about 41 K. When the Cr substitution amount is x = 0.06, the charge ordering phase of the mother's body is de- stroyed, because the Cr<'3+> substitution for Mn<'3+> destroys the spin order of CE-type antiferromagnetism, and thus leads to the melting of charge ordering. It is verified experimentally that the strong coupling between charge order and spin order exists in the charge order system of CE-type antiferromagnetism

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Destruction of charge ordering phase in La0.4Ca0.6MnO3 induced by low Cr doping

参考文献