| Preparation and magnetic properties of nanosized （La0. 47Gd0. 2 ） Sr0. 33 MnO3 |
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| 引用本文： | 王贵,王正德,张立德.Preparation and magnetic properties of nanosized （La0. 47Gd0. 2 ） Sr0. 33 MnO3[J].中国有色金属学会会刊,2005,15(3):542-547. |
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| 作者姓名： | 王贵 王正德 张立德 |
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| 作者单位： | College of Engineering，Zhanjiang Ocean University，Zhanjiang 524088，China，Institute of Solid State Physics，Chinese Academy of Sciences，Hefei 230031，China，Institute of Solid State Physics，Chinese Academy of Sciences，Hefei 230031，China，Institute of Solid State Physics，Chinese Academy of Sciences，Hefei 230031，China |
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| 基金项目： | 国家自然科学基金，the Talent Foundation of Anhui Province，the Science Foundation of Anhui Province |
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| 摘 要： | 1INTRODUCTION Themagneticpropertyandcrystalstructureof perovskite typelanthanummanganeseoxideswere firststudiedbyJonkerandVanSantenin19501].Thesematerialswereofconsiderableinterestinthe lastdecadeduetotheircolossalmagnetoresistance(CMR)effect24].Recentlyaseriesofhole dopedperovskitemanganeseoxideswerereportedtodis playalargemagnetocaloriceffect(MCE)inthevic inityoftheferromagneticCurietemperature(Tc)516],whichmaybeexploitedtobeappliedin magneticrefrigeratorandheatpumps17].Idealmag…
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| 关 键 词： | 化学合成 纳米结构材料 磁热效应 磁熵交换 钙钛水锰矿 |
Preparation and magnetic properties of nanosized (La0.47Gd0.2 ) Sr0.33 MnO3 |
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| WANG Gui,WANG Zheng-de,ZHANG Li-de.Preparation and magnetic properties of nanosized (La0.47Gd0.2 ) Sr0.33 MnO3[J].Transactions of Nonferrous Metals Society of China,2005,15(3):542-547. |
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| Authors: | WANG Gui WANG Zheng-de ZHANG Li-de |
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| Abstract: | Nanosized (La0.47Gd0.2)Sr0.33MnO3 perovskite oxides were prepared at relatively low calcinating temperature of 600 ℃ and 800 ℃ for 10 h using amorphous complex precursor. Curie temperature (Tc) and magnetocaloric effects(MCE) were investigated. X-ray diffraction(XRD) and electron diffraction(ED) reveal that the resulting products are of pure single-phase rhombohedral perovskite structure. Transmission electron microscopy (TEM) observation finds that the particle sizes are about 40 - 50 nm and 80 - 100 nm, and the Tc are 285.1 K and with a broad peak around Curie temperature is observed in sample sintered at 800 ℃ for 10 h. This suggests that nanosized (La0.47Gd0.2)Sr0.33MnO3 is a suitable material as working substance in magnetic refrigeration in room temperature. |
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| Keywords: | chemical synthesis nanostructure materials magnetocaloric effect magnetic entropy change perovskite manganite |
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