| Magnetic properties and magnetocaloric effect in TbCo2-xFex compounds |
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| 作者姓名： | 邹君鼎 沈保根 孙继荣 |
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| 作者单位： | State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of
Sciences, Beijing 100080, China;State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of
Sciences, Beijing 100080, China;State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of
Sciences, Beijing 100080, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China
(Grant No~50571112) and the National Basic Research Program of China (Grant
No~2006CB601101). |
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| 摘 要： | Magnetic properties and magnetocaloric effect in TbCo2-xFex compounds are studied by DC magnetic measurement. With increasing content of Fe, the entropy changes decrease slightly, though the Curie temperature is tuned from 231 K （x = 0） to 303 K （x = 0.1）. Magnetic entropies of TbCo2 compound are calculated by using mean field approximation （MFA）. Results estimated by using Maxwell relation are consistent with that of MFA calculation. It is shown that the entropy changes are mainly derived from the magnetic entropy changes. The lattice has almost no contribution to the entropy change in the vicinity of phase transition.
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| 关 键 词： | 磁性特征 近似值 传输模式 铽 |
| 文章编号： | 1009-1963/2007/16（12）/3843-05 |
| 收稿时间： | 2007-04-12 |
| 修稿时间： | 2007-06-05 |
Magnetic properties and magnetocaloric effect in TbCo2-xFex compounds |
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| Zou Jun-Ding,Shen Bao-Gen and Sun Ji-Rong.Magnetic properties and magnetocaloric effect in TbCo2-xFex compounds[J].Chinese Physics B,2007,16(12):3843-3847. |
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| Authors: | Zou Jun-Ding Shen Bao-Gen and Sun Ji-Rong |
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| Institution: | State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of
Sciences, Beijing 100080, China |
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| Abstract: | Magnetic properties and magnetocaloric effect in TbCo$_{2 - x}$Fe$_{x}$
compounds are studied by DC magnetic measurement. With increasing content of
Fe, the entropy changes decrease slightly, though the Curie
temperature is
tuned from 231 K ($x=0$) to 303 K ($x=0.1$). Magnetic entropies of TbCo$_{2}$
compound are calculated by using mean field approximation (MFA). Results
estimated by using Maxwell relation are consistent with that of MFA
calculation. It is shown that the entropy changes are mainly derived from
the magnetic entropy changes. The lattice has almost no contribution to the
entropy change in the vicinity of phase transition. |
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| Keywords: | magnetocaloric effect mean field approximation metamagnetic transition |
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