Room-temperature magnetic Heusler compound Fe2Ti0.5Co0.5Si with semiconducting behavior

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:474

Article

Jin, Yunlong^1,2  Yang, Yi¹  Valloppilly, Shah²  Liou, Sy-Hwang^1,2  Sellmyer, David J.^1,2 

[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

[2] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA

关键词: Magnetic semiconducting behavior;    Hensler compound;    High Curie temperature;   

DOI  :  10.1016/j.jmmm.2018.11.063

来源: Elsevier

【 摘 要 】

The structural, magnetic and electron-transport properties of Fe2Ti0.5Co0.5Si are investigated. It is demonstrated that rapidly quenched Fe2Ti0.5Co0.5Si ribbons crystallize in the L2(1) structure, indicating a full Heusler compound, and exhibit ferromagnetism with a high Curie temperature of about 790 K. Moreover, Fe2Ti0.5Co0.5Si exhibits semiconducting behavior with a negative temperature coefficient of resistivity, a room-temperature resistivity of about 6.5 m Omega cm and a residual resistivity rho(o) of about 6.75 m Omega cm. The carrier concentration n is 1.15 x 10(20) cm(-3) at 5 K. The magnetic semiconducting behavior with a high Curie temperature makes this material promising for room-temperature spintronic and magnetic applications.

【 授权许可】

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