Magnetic properties of ultrafine Fe-Ni-B particles

Journal Article · Tue May 01 00:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.344887· OSTI ID:6838280

Nafis, S; Hadjipanayis, G C; Sorensen, C M ^[1]; Klabunde, K J ^[2]

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1. Department of Physics, Kansas State University, Manhattan, Kansas 66506 (USA)
2. Department of Chemistry, Kansas State University, Manhattan, Kansas 66506 (USA)

Ultrafine Fe-Ni-B particles were synthesized by reducing iron and nickel salts with NaBH{sub 4} in aqueous solutions. The particles had diameters in the range of 100--300 A. X-ray diffraction patterns showed that particles with boron concentration 18 at. % or more were amorphous; otherwise they were crystalline. It was also found that the amorphous particles contain less than 50 at. % of Fe. The coercivity of Fe-B particles was increased by an addition of a small amount of Ni to the system. The room-temperature coercivity and saturation magnetization for particles of composition Fe{sub 63}Ni{sub 24}B{sub 13} and of diameter 100 A were 1275 Oe and 70 emu/g, respectively.

• OSTI ID: 6838280
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:9; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMORPHOUS STATE
BORON ALLOYS
COERCIVE FORCE
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETIZATION
MEDIUM TEMPERATURE
NICKEL ALLOYS
PHYSICAL PROPERTIES
SATURATION
SCATTERING
X-RAY DIFFRACTION