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journal article·2018-05-01Open access

Tunable ferromagnetic resonance behavior in Co2FeSi film by post-annealing

Zhan Xu, Zhi Zhang, Fang Hu, Xia Li, Peng Liu, Er Liu, Feng Xu

AIP Advances· Volume 8· Issue 5
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Source abstract

Abstract

Co2FeSi film is potential in the spintronics applications, due to its low damping factor, which is reflected in the ferromagnetic resonance behavior. In this work, we demonstrate that the ferromagnetic resonance behavior in Co2FeSi film can be well engineered by post-annealing. After 450 °C post-annealing for 1 hour, the Gilbert damping factor decreases drastically from 0.039 at as-deposited state to 0.006, and the inhomogeneity contribution of ferromagnetic resonance linewidth decreases to 60.5 Oe. These decreases are ascribed to the crystallization of film from amorphous state to an ordered B2 phase. Higher annealing temperature, however, leads to the formation of the A2 phase with higher atomic disorder, instead of B2 phase, and brings about the increase of Gilbert damping.
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Research context

Materials processing

OpenAlex topics: Heusler alloys: electronic and magnetic properties · ZnO doping and properties · Magnetic properties of thin films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology, School of Materials Science and Engineering, Nanjing University of Science and Technology 1 , Nanjing 210094, China

School of Mechanical Engineering, Nanjing University of Science and Technology 2 , Nanjing 210094, China

Funding

Fundamental reaearch Funds for the Central Universities · Postdoctoral Science Foundation Funded Project of Jiangsu Province · Qing Lan Project of Jiangsu Province · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Natural Science Foundation of Jiangsu Province

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