کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7992610 | 1516148 | 2018 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure and magnetic properties of layered compounds RMn1.7Cr0.3Si2C (Râ¯=â¯Nd, Sm, Dy)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
The carbon doped RMn1.7Cr0.3Si2C (Râ¯=â¯Nd, Sm, Dy) compounds were prepared by arc melting and investigated using room temperature (RT) X-ray diffraction (XRD), neutron powder diffraction (NPD) and magnetic measurements. Carbon atoms were found to occupy the interstitial site (0, 0, 0.125) in a superstructure with the space group P4/mmm at room temperature. There exists a disordered substitution between the R atoms and corresponding Si dumbbells on the same layer perpendicular to c direction in the carbides. The Mn/Cr sublattice of the carbides exhibits ferromagnetic characteristics at room temperature despite of a very short intralayer interatomic distance (dMn-Mnâ¯=â¯2.796â¯Ã
for Râ¯=â¯Dy), which is far below the critical distance for a ferromagnetic (dMn-Mn >2.87â¯Ã
) ordering of Mn sublattice due to the strong hybridization between the interstitial C and the Mn/Cr atoms. Different phase transitions of the carbides have different response to the external magnetic field. These carbides provide the potential for further research on magneto-transport properties and magnetocaloric effect. Additionally, spin reorientation was observed in SmMn1.7Cr0.3Si2C owing to the competence of magnetocrystalline anisotropy between the Mn/Cr sublattice and the Sm sublattice.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 746, 25 May 2018, Pages 238-243
Journal: Journal of Alloys and Compounds - Volume 746, 25 May 2018, Pages 238-243
نویسندگان
Youfang Lai, Kun Li, Guanyi Qiao, Fanggui Wang, Hui Zhao, Wenyun Yang, Jinbo Yang, Honglin Du,