Development and intrinsic properties of hexagonal ferromagnetic (Zr,Ti)Fe2

W. Y. Zhang, X. Z. Li, S. Valloppilly, R. Skomski, J. E. Shield, D. J. Sellmyer

Research output: Contribution to journalArticle

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Abstract

Nanocrystalline Ti0.75Zr0.25Fe2+x (x=0-0.4) and Ti0.75-yByZr0.25Fe2.4 (y=0-0.35) with high saturation magnetization have been fabricated by the melt-spinning technique. Nanocrystalline Ti0.75Zr 0.25Fe2+x consists of the hexagonal C14 Laves phase (Ti,Zr)Fe2. 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 (Js) and Curie temperature (Tc). The magnetocrystalline anisotropy constant K also increases with increasing x. Excessive Fe addition (x>0.25) may induce structural disorder which lowers the Js and Tc. Nanocrystalline Ti0.75-yByZr 0.25Fe2.4 is composed of hexagonal (Ti,Zr)Fe2 and Fe-rich amorphous phases with relatively high Js. The lattice parameters a, c and cell volume V are almost unchanged with the increase of y for y≥0.16. Simultaneously, the Tc of (Ti,Zr)Fe2 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 Js up to 10.8 kG. Further B addition (y>0.30) decreases Js, possibly due to the decrease of the Js of the amorphous phase.

Original languageEnglish (US)
Article number17A769
JournalJournal of Applied Physics
Volume115
Issue number17
DOIs
StatePublished - May 7 2014

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lattice parameters
saturation
melt spinning
Laves phases
augmentation
cells
Curie temperature
disorders
magnetization
anisotropy
polarization
diffraction
x rays
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Development and intrinsic properties of hexagonal ferromagnetic (Zr,Ti)Fe2. / Zhang, W. Y.; Li, X. Z.; Valloppilly, S.; Skomski, R.; Shield, J. E.; Sellmyer, D. J.

In: Journal of Applied Physics, Vol. 115, No. 17, 17A769, 07.05.2014.

Research output: Contribution to journalArticle

Zhang, W. Y. ; Li, X. Z. ; Valloppilly, S. ; Skomski, R. ; Shield, J. E. ; Sellmyer, D. J. / Development and intrinsic properties of hexagonal ferromagnetic (Zr,Ti)Fe2. In: Journal of Applied Physics. 2014 ; Vol. 115, No. 17.
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