Chin. Phys. Lett.  2012, Vol. 29 Issue (4): 047501    DOI: 10.1088/0256-307X/29/4/047501
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Magnetoresistance Effect in Antiferromagnet-Based Nanogranular Films
CHEN Feng-Liang,ZHOU Shi-Ming**
1Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, and Department of Physics, Tongji University, Shanghai 200092
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CHEN Feng-Liang, ZHOU Shi-Ming 2012 Chin. Phys. Lett. 29 047501
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Abstract Magnetic and magneto-transport properties of nano-structured CoO-Ag granular films are reported. Apparent magnetization hysteresis is observed for low CoO contents and becomes weaker with increasing CoO content. Magnetoresistance (MR) ratio has a maximal value near 84vol% CoO and is reduced at low CoO contents. It decreases with increasing temperature and disappears near the Néel temperature of CoO. The uncompensated magnetic moments of CoO particles have been clearly demonstrated by MR effect.
Received: 31 December 2011      Published: 04 April 2012
PACS:  75.50.Ee (Antiferromagnetics)  
  75.47.De (Giant magnetoresistance)  
  75.75.+a  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/29/4/047501       OR      https://cpl.iphy.ac.cn/Y2012/V29/I4/047501
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CHEN Feng-Liang
ZHOU Shi-Ming
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