| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Doping Effect of Co at Ag Sites in Antiperovskite Mn3AgN Compounds |
| CHU Li-Hua1,2, WANG Cong2**, SUN Ying2, LI Mei-Cheng1, WAN Zi-Pei1, WANG Yu1, DOU Shang-Yi1, CHU Yue1 |
1State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, School of Renewable Energy, North China Electric Power University, Beijing 102206
2Center for Condensed Matter and Materials Physics, Department of Physics, Beihang University, Beijing 100191
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CHU Li-Hua, WANG Cong, SUN Ying et al 2015 Chin. Phys. Lett. 32 047501 |
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Abstract Antiperovskite compounds Mn3Ag1?xCoxN (x=0.2, 0.5 and 0.8) are synthesized and the doping effect of the magnetic element Co at the Ag site is investigated. The crystal structure is not changed by the introduction of Co. However, with the increase of the content of Co, the spin reorientation gradually disappears and the antiferromagnetic transition changes to the ferromagnetic transition at the elevated temperature when x=0.8. In addition, all of the magnetic phase transitions at the elevated temperature are always accompanied by the abnormal thermal expansion behaviors and an entropy change. Moreover, when x=0.8, the coefficient of linear expansion is ?1.89×10?6 K?1 (290–310 K, ΔT=20 K), which is generally considered as the low thermal expansion.
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Received: 08 December 2014
Published: 30 April 2015
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