Synthesis, structural, and magnetic properties of Heusler-type Mn2-xFe1+xGe (0.0 ≤ x ≤ 1.0) alloys

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:538

Article

Aryal, Anil¹  Dubenko, Igor¹  Zamora, J.²  Llamazares, J. L. Sanchez²  Sanchez-Valdes, C. F.³  Mazumdar, Dipanjan¹  Talapatra, Saikat¹  Stadler, Shane⁴  Ali, Naushad¹ 

[1] Southern Illinois Univ, Dept Phys, Carbondale, IL 62901 USA

[2] Inst Potosino Invest Cient & Tecnol AC, Camino Presa San Jose 2055 Col Lomas 4a, San Luis Potosi 78216, Slp, Mexico

[3] Univ Autonoma Ciudad Juarez UACJ, Dept Fis & Matemat, Div Multidisciplinaria Ciudad Univ, Inst Ingn & Tecnol, Ciudad Juarez 32310, Chihuahua, Mexico

[4] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

关键词: Heusler-type Mn2-xFe1+xGe alloys;    Crystal structure;    Magnetization;    Curie temperature;   

DOI  :  10.1016/j.jmmm.2021.168307

来源: Elsevier

【 摘 要 】

Bulk Mn2-xFe1+xGe (0.0 <= x <= 1.0) alloys have been synthesized by arc-melting followed by a low temperature homogenization thermal annealing, whereas for comparison purposes the Mn2FeGe alloy was also produced in ribbon form by rapid solidification. A study of the structural and magnetic properties is presented. Contrary to theoretical predictions, Mn2FeGe crystallizes in a hexagonal DO19 crystal structure (space group P63/mmc) and orders ferromagnetically with a saturation magnetization (M-S) value of similar to 1.7 mu(B)/f.u. in the ground state. With the substitution of Fe for Mn in bulk Mn2-xFe1+xGe, we observed an increase in the FM interactions with a maximum M-S value of 5.1 mu(B)/f.u. for x = 1.0, and a significant progressive increase in the Curie temperature (T-C) in a wide range spanning similar to 200 K to over 400 K.

【 授权许可】

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