Influence of Particle Size on the Spin Pinning Effect in the fcc-FePt Nanoparticles

Journal Article · Sat Jun 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5091-7· OSTI ID:22921212

Yu, Jing; Han, Dong; Ying, Yao; Qiao, Liang; Zheng, Jingwu; Li, Wangchang; Li, Juan; Cai, Wei; Che, Shenglei ^[1]; Wakiya, Naoki; Suzuki, Hisao ^[2]

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1. Zhejiang University of Technology, College of Materials Science and Engineering (China)
2. Shizuoka University, Graduate School of Science and Technology (Japan)

In this work, the Fe{sub 60}Pt{sub 40} nanoparticles were synthesized through the chemical reduction method by using the Fe(CO){sub 5} and the Pt(acac){sub 2} as the metallic precursor. The particle size of the synthesized FePt nanoparticles was controlled by adjusting the reaction conditions involving of the Fe(CO){sub 5}-injecting temperature and the soak time of reaction. The structure, morphology, and magnetic properties of the synthesized FePt nanoparticles were characterized by XRD, TEM, and vibrating sample magnetometer (VSM), respectively. The synthesized nanoparticles exhibit uniform size and good dispersity. The magnetization behaviors indicate that the nanoparticles present the core-shell magnetic structure including the ferromagnetic core part and the spin-disorder shell part. There exists a spin pinning effect of the shell part on the core part. The increase of particle size weakens the spin pinning effect.

• OSTI ID: 22921212
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 6 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
BINARY ALLOY SYSTEMS
FCC LATTICES
IRON COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIZATION
NANOPARTICLES
PLATINUM COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION