Magnetic, Mössbauer, and resistivity studies of amorphous Fe₇₄Zr₂₆ and Fe₈₁Hf₁₉ alloys

Authors

C. L. Chien, Johns Hopkins University
K. M. Unruh, Johns Hopkins University
A. Levy, Johns Hopkins University
Sy_Hwang Liou, University of Nebraska-LincolnFollow
J. P. Stokes, Johns Hopkins University
R.J. Gambino, IBM Thomas J. Watson Research Center, Yorktown Heights, New York
K. Fukamichi, IBM Thomas J. Watson Research Center, Yorktown Heights, New York

Date of this Version

3-1-1982

Comments

Published by American Institute of Physics. J. Appl. Phys. 53, 2307 (1982). ©1982 American Institute of Physics. Permission to use. Journal home page = http://jap.aip.org/jap/.

Abstract

Amorphous metal-metal samples of Fe₇₄Zr₂₆ and Fe₈₁Hf₁₉ have been studied by bulk magnetic, Mössbauer spectroscopy and resistivity measurements. The values of T_c have been determined to be 285 K and 295 K for Fe₇₄Zr₂₆ and Fe₈₁Hf₁₉, respectively. Both the magnetic isotherms and Mössbauer measurements indicate that these samples are ferromagnetics. The isomer shifts and the quadrupole interactions are much smaller than those of amorphous Fe-metalloid systems. The P(H) are broad and extend to small H values. Negative temperature coefficients of the resistivity are observed at low temperatures followed by a resistivity minimum at temperatures slightly above room temperature. These results are significantly different from those of amorphous Fe-metalloid systems with comparable Fe contents.