铬元素掺杂对Fe3-xCrxSe4磁性物理性能影响研究
PDF下载 (330)董晓曦,钟承权,王 军 *.铬元素掺杂对Fe3-xCrxSe4磁性物理性能影响研究[J].宁波大学学报(理工版),2018,31(5):86-90.DOI:
DONG Xiao-xi,ZHONG Cheng-quan,WANG Jun *.Effect of chromium doping on magnetic properties of Fe3-xCrxSe4[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(5):86-90.DOI:
| Title: | Effect of chromium doping on magnetic properties of Fe3-xCrxSe4 |
| 作者: | 董晓曦, 钟承权, 王 军 * |
| Author(s): | DONG Xiao-xi, ZHONG Cheng-quan, WANG Jun * |
| 关键词: | Fe3-xCrxSe4纳米颗粒; 居里温度; 矫顽力 |
| Keywords: | Fe3-xCrxSe4 nanoparticles; Curie temperature; coercivity |
| 分类号: | O469 |
| 文献标识码: | A |
| 摘要: | 利用溶剂热法合成了单斜Fe3-xCrxSe4纳米颗粒. 随着铬掺杂量的增加, Fe3-xCrxSe4纳米颗粒X射线衍射的峰位置向左偏移, 这是由于晶格常数发生改变引起的. 而Fe3-xCrxSe4纳米颗粒(x>0.3)晶胞体积的扩张则是由于磁性离子之间的铁磁相互作用增强造成的, 从而导致了Fe3Se4的居里温度从321K显著增加到Fe2.1Cr0.9Se4的348K, 明显不同于块体材料的磁性. 低温矫顽力分析显示出明显的增长趋势, 从Fe3Se4纳米颗粒的28kOe增加到Fe2.3Cr0.7Se4纳米颗粒的42kOe, 但在进一步提高铬的掺杂量时, 矫顽力则会逐渐降低. |
| Abstract: | Monoclinic Fe3-xCrxSe4nanoparticles are synthesized by high-temperature solution chemical method. With the increase of chromium doping amount, the peak position of Fe3-xCrxSe4nanoparticles in X-ray diffraction is slightly shifted to the left due to the change of lattice constant. And the expansion of Fe3?xCrxSe4 nanoparticles (x>0.3) may be caused by the increase of ferromagnetic interaction between the magnetic ions, leading to the Curie temperature (TC) of Fe3Se4 from 321K increased to Fe2.1Cr0.9Se4 3 48K, significantly different from the bulk material of the magnetic. Low temperature coercivity analysis shows a clear trend of increasing from 28kOe for Fe3Se4 nanoparticles to 42kOe for Fe2.3Cr0.7Se4 nanoparticles. However, it is found that when the doping amount of chromium is further increased, the coercivity will gradually decline. |
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| 备注/Memo: | 收稿日期: 2017－12－27. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（11474174）. 第一作者: 董晓曦（1992－）, 男, 河南新乡人, 在读硕士研究生, 主要研究方向: 磁性纳米材料. E-mail: 1511071444@nbu.edu.cn *通信作者: 王军（1969－）, 男, 江西丰城人, 教授, 主要研究方向: 磁性纳米材料. E-mail: wangjun2@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
