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Sm—Mn離子取代鍶鐵氧體的制備及其表征

2018-03-24 10:08:48余兆偉吳澤單連偉董麗敏韓志東張顯友
哈爾濱理工大學學報 2018年1期

余兆偉 吳澤 單連偉 董麗敏 韓志東 張顯友

摘要:采用高溫固相法制備了Sr1-xSmxFe12-xMnxO19(x=0~0.4)。利用XRD、SEM、VSM等表征手段對鍶鐵氧體的晶相、形貌和磁性能進行了表征。通過XRD分析發現當摻雜量0≤x<0.2時衍射峰基本沒有出現雜峰,衍射峰的強度比較高,粉體為結晶度比較高的單一六方相鍶鐵氧體。通過SEM發現隨著摻雜量的增加晶體的晶粒尺寸逐漸增大;通過VSM分析發現:隨著摻雜量的增大矯頑力Hc出現先增大后減小的趨勢。測試結果表明:當摻雜量在x=0.2時SmMn聯合取代鍶鐵氧體的結晶度最好,矯頑力最大Hc=33.417emu/g。

關鍵詞:SmMn聯合取代;固相法;磁性能

DOI:10.15938/j.jhust.2018.01.009

中圖分類號: O737

文獻標志碼: A

文章編號: 1007-2683(2018)01-0046-05

Abstract:The Sr1-xSmxFe12-xMnxO19(x=0~0.4) materials were prepared by highheating solidstate reaction. The products were characterized by Xray diffraction (XRD), scanning electric microscope(SEM) and vibrating sample magnetometer(VSM). The XRD results analysis showed that Sm3+ and Mn2+ have been completely doped into strontium ferrite phase for Sr1-xSmxFe12-xMnxO19(0≤x<0.2). With the increase of SmMn content,the grain size gradually increases. VSM results indicate that the Hc increases (x being in the range of 0-0.2), and then decrease with the dosages of SmMn from 0 to 0.4. The results showed that when x being equal to 0.2, the crystallization was best and the maximum Hc (33.417emu/g) was obtained.

Keywords:SmMn codoping; solidstate reaction; magnetic properties

參 考 文 獻:

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(編輯:溫澤宇)

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