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Title: Structural and magnetic properties of magnetostrictive Fe-Ga-Zr nanocrystalline alloy

Journal Article · · Journal of Alloys and Compounds
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [2];  [3];  [1]
  1. Case Western Reserve University, Cleveland, OH (United States)
  2. Oberlin College, OH (United States)
  3. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

(Fe1–xGax)92Zr8 amorphous and nanocrystalline alloys with x = 0.15 to x = 0.36 were investigated to improve the magnetic softness of Galfenol-type alloys and to evaluate their magnetostrictive properties. The samples were prepared by melt spinning of arc melted ingots. The rapidly solidified ribbons were annealed at 823 K for 1 h to produce a nanocrystalline structure. X-ray Diffraction data showed that after annealing, body-centered cubic (BCC) Fe-Ga phase crystallized for x = 0.15 to x = 0.26. When x exceeded 0.26, the ribbons crystallized into BCC and a ternary intermetallic phase (i.e., ZrFe6Ga6) which has deteriorating effect on saturation magnetization, magnetic softness and magnetostriction coefficient. The annealed ribbons’ saturation magnetization value decreases from 126 Am2/kg to 54 Am2/kg as the Ga content increased from x = 0.15 to x = 0.36. The alloy with x = 0.26 annealed at 823 K for 1 h shows a peak magnetostriction of 10 ppm with saturation magnetization of 110 Am2/kg and coercivity of 260 A/m.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC52-07NA27344; DMR-0922588
OSTI ID:
1999726
Alternate ID(s):
OSTI ID: 1999900
Report Number(s):
LLNL-JRNL-841885; 1064004; TRN: US2405478
Journal Information:
Journal of Alloys and Compounds, Vol. 958; ISSN 0925-8388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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