57Fe,61Ni and91Zr hyperfine field distributions in magnetic Tm-Zr amorphous alloys
Pulsed NMR measurements were performed on [Tm1 (Tm2)]90+xZr10−x (Tm=Fe, Co, Ni) amorphous alloys utilizing a newly developed low temperature wide band probehead-preamplifier system. A 11,6 T broad57Fe hyperfine field distribution around the average of 23.6 T together with a less intensive peak around 11 T has been found in Fe90.6Zr9.4, in excellent agreement with Mössbauer studies. A rather flat distribution around the average value of 14.8 T characterizes the transferred hyperfine field at the Zr sites in the same alloy. Both features provide strong evidence for a broad range of exchange interactions and variations in the spin density at the Fe sites in this material. A much narrower and symmetrical distribution at the Zr sites around 10 T in Co90Zr10 is evidence of the higher magnetic homogeneity of this alloy as compared to Fe90Zr10. In Fe60Ni30Zr10, in addition to the57Fe signal, a contribution from61Ni nuclei could be separated, corresponding to an average hyperfine field value of 15.3 T.
KeywordsThin Film Strong Evidence Excellent Agreement Exchange Interaction Wide Band
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- E.A. Turov and M.P. Petrov,NMR in Ferro- and Antiferromagnets (Halsted Press, 1972).Google Scholar
- K. Oshima, M. Tanimoto, F.E. Fujita, M. Nose and T. Masumoto, Proc. 4th Int. Conf. on Rapidly Quenched metals, Sendai (1982) p. 1117.Google Scholar
- M. Wójcik, H. Lerchner and M. Rosenberg, Proc. XXII Congres Ampère, Zürich (1984) p. 115.Google Scholar
- Varian NMR Table, 5th ed. (1965).Google Scholar
- P. Deppe, private communication.Google Scholar
- M. Rosenberg, U. Hardebusch, A. Schöne-Warnefeld, R. Wernhardt and K. Fukamichi, J. Phys. F (1987), to be published.Google Scholar
- W. Brückner, K. Kleinstück and G.E.R. Schulze, Phys. Stat. Sol. 23(1967)475.Google Scholar