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Chinese Physics, 2005, Vol. 14(1): 192-195    DOI: 10.1088/1009-1963/14/1/035
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Effects of Gd substitution on magnetic and transport properties in La0.6-xGdxSr1.4MnO4

Ma Xiao (马骁), Lu Yi (鲁毅), Kou Zhi-Qi (寇志起), Di Nai-Li (邸乃力), Cheng Zhao-Hua (成昭华), Li Qing-An (李庆安)
State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
Abstract  With the increasing of x, the ZFC (zero-field cooling) M-T curves for the polycrystals La0.6-xGdxSr1.4MnO4(x=0, 0.1, 0.2, 0.4,0.6) change from spin-glass-like to paramagnetic, and each ZFC M-T curve has an inflection point at 20K. These behaviours can be understood by considering the respective contributions of Mn and Gd to the total magnetism. In addition, for all the samples, thermal activation conducting behaviours are observed from 100 K to room temperature. Due to the strong antiferromagnetic coupling between neighbouring Mn ions, there is no obvious magnetoresistance effect until the magnetic field strength rises to $3.98\times10^6$A/m.
Keywords:  spin glass      magnetism      antiferromagnetic      magnetoresistance  
Received:  19 March 2004      Revised:  01 September 2004      Accepted manuscript online: 
PACS:  7170G  
  7550E  
  7550L  

Cite this article: 

Ma Xiao (马骁), Lu Yi (鲁毅), Kou Zhi-Qi (寇志起), Di Nai-Li (邸乃力), Cheng Zhao-Hua (成昭华), Li Qing-An (李庆安) Effects of Gd substitution on magnetic and transport properties in La0.6-xGdxSr1.4MnO4 2005 Chinese Physics 14 192

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