1.2Mn0.8B化合物;居里溫度;磁性能;磁熱效應(yīng)"/> 1.2Mn0.8B化合物,并對(duì)其晶體結(jié)構(gòu)、磁性能和磁熱效應(yīng)進(jìn)行了研究。結(jié)果表明,Co1.2Mn0.8B化合物的物相為Co2B單相結(jié)構(gòu),具有CuAl2型體心正方晶體結(jié)構(gòu),空間群為I14/mcm；在居里溫度TC=175 K附近,化合物發(fā)生了鐵磁(FM)-順磁(PM)二級(jí)磁相轉(zhuǎn)變,熱滯為0.7 K；Co1.2Mn0.8B化合物在外磁場(chǎng)0~5 T變化下的最大磁熵變?chǔ)M為1.17 J.(Kg.K)-1,其對(duì)應(yīng)的溫度不隨外場(chǎng)的變化而變化。該材料在磁制冷和磁熱傳感器領(lǐng)域具有潛在的參考價(jià)值。"/>

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Co1.2Mn0.8B化合物的磁性能與磁熱效應(yīng)
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桂林電子科技大學(xué) 材料科學(xué)與工程學(xué)院,桂林電子科技大學(xué) 材料科學(xué)與工程學(xué)院,桂林電子科技大學(xué) 材料科學(xué)與工程學(xué)院,桂林電子科技大學(xué) 材料科學(xué)與工程學(xué)院

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國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(2014CB643703)；廣西信息材料重點(diǎn)實(shí)驗(yàn)室項(xiàng)目(161011-Z)；桂林電子科技大學(xué)-中鋁廣西有色金源稀土有限公司研究生聯(lián)合培養(yǎng)基地專項(xiàng)經(jīng)費(fèi)資助項(xiàng)目(20160513-11-Z)；國(guó)家自然科學(xué)基金(51461012),廣西自然科學(xué)基金(2016GXNSFAA380030)


Magnetic Properties and Magnetocaloric Effect of Co1.2Mn0.8B Compound
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School of Materials Science and Engineering,Guilin University of Electronic Technology,School of Materials Science and Engineering,Guilin University of Electronic Technology,School of Materials Science and Engineering,Guilin University of Electronic Technology,School of Materials Science and Engineering,Guilin University of Electronic Technology

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    摘要:

    本文采用球磨和固相反應(yīng)相結(jié)合的方法制備了Co1.2Mn0.8B化合物,并對(duì)其晶體結(jié)構(gòu)、磁性能和磁熱效應(yīng)進(jìn)行了研究。結(jié)果表明,Co1.2Mn0.8B化合物的物相為Co2B單相結(jié)構(gòu),具有CuAl2型體心正方晶體結(jié)構(gòu),空間群為I14/mcm；在居里溫度TC=175 K附近,化合物發(fā)生了鐵磁(FM)-順磁(PM)二級(jí)磁相轉(zhuǎn)變,熱滯為0.7 K；Co1.2Mn0.8B化合物在外磁場(chǎng)0~5 T變化下的最大磁熵變?chǔ)M為1.17 J.(Kg.K)-1,其對(duì)應(yīng)的溫度不隨外場(chǎng)的變化而變化。該材料在磁制冷和磁熱傳感器領(lǐng)域具有潛在的參考價(jià)值。

    Abstract:

    In this paper, the Co1.2Mn0.8B compound was prepared by ball milling and solid state reaction. The crystal structure, magnetic properties and magnetocaloric effect of Co1.2Mn0.8B compound have been investigated. The results show that the phase structure of the compound is Co2B single phase with the CuAl2-type tetragonal crystal structure, space group of I14/mcm. The Co1.2Mn0.8B compound undergone second-order magnetic phase transitions from ferromagnetic (FM) state to paramagnetic (PM) state in the vicinity of Curie temperature of 175K, and the thermal hysteresis is about 0.7 K. The maximal magnetic-entropy change (ΔSM) of the compound reaches to 1.17 J/kg.K in an external magnetic field of 0~5.0 T. and the temperature corresponding to ΔSMdoes not change with the variation of the external field. The material has a potential value in the field of magnetic refrigeration and magnetic heat sensor.

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王島,馬壘,趙世謙,郭永斌. Co1.2Mn0.8B化合物的磁性能與磁熱效應(yīng)[J].稀有金屬材料與工程,2018,47(9):2782~2786.[Wang Dao, Ma Lei, Zhao Shiqian, Guo Yongbin. Magnetic Properties and Magnetocaloric Effect of Co1.2Mn0.8B Compound[J]. Rare Metal Materials and Engineering,2018,47(9):2782~2786.]
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  • 收稿日期:2016-11-15
  • 最后修改日期:2017-01-06
  • 錄用日期:2017-02-21
  • 在線發(fā)布日期: 2018-11-01
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