Development and intrinsic properties of hexagonal ferromagnetic (Zr,Ti)Fe{sub 2}
- Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588 (United States)
Nanocrystalline Ti{sub 0.75}Zr{sub 0.25}Fe{sub 2+x} (x = 0-0.4) and Ti{sub 0.75−y}B{sub y}Zr{sub 0.25}Fe{sub 2.4} (y = 0-0.35) with high saturation magnetization have been fabricated by the melt-spinning technique. Nanocrystalline Ti{sub 0.75}Zr{sub 0.25}Fe{sub 2+x} consists of the hexagonal C14 Laves phase (Ti,Zr)Fe{sub 2}. Fe addition decreases the lattice parameter a and shrinks the cell volume. The antiferromagnetic Fe-Fe interactions may decrease with the increase of x, leading to a significant enhancement of saturation polarization (J{sub s}) and Curie temperature (T{sub c}). The magnetocrystalline anisotropy constant K also increases with increasing x. Excessive Fe addition (x > 0.25) may induce structural disorder which lowers the J{sub s} and T{sub c}. Nanocrystalline Ti{sub 0.75−y}B{sub y}Zr{sub 0.25}Fe{sub 2.4} is composed of hexagonal (Ti,Zr)Fe{sub 2} and Fe-rich amorphous phases with relatively high J{sub s}. The lattice parameters a, c and cell volume V are almost unchanged with the increase of y for y ≥ 0.16. Simultaneously, the T{sub c} of (Ti,Zr)Fe{sub 2} remains unchanged, indicating that B does not enter this lattice but takes part in forming the amorphous phase, in good agreement with the X-ray diffraction results. The volume fraction of the amorphous phase increases with the increase of B content and results in a large enhancement of J{sub s} up to 10.8 kG. Further B addition (y > 0.30) decreases J{sub s}, possibly due to the decrease of the J{sub s} of the amorphous phase.
- OSTI ID:
- 22273709
- Journal Information:
- Journal of Applied Physics, Vol. 115, Issue 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
AMORPHOUS STATE
ANISOTROPY
ANTIFERROMAGNETISM
CONCENTRATION RATIO
CRYSTALS
CURIE POINT
FERROMAGNETIC MATERIALS
INTERMETALLIC COMPOUNDS
IRON
LATTICE PARAMETERS
LAVES PHASES
MAGNETIZATION
NANOSTRUCTURES
POLARIZATION
TITANIUM
X-RAY DIFFRACTION
ZINC