Abstract
The magnetic properties of a 50-to 2-nm-thick surface layer in hexagonal ferrite BaFe12O19 single crystals are investigated for the first time. Measurements are made on a conversion-electron Mössbauer spectrometer constructed on the basis of a unique ultrahigh-vacuum magnetostatic electron analyzer of the “orange” type. An analysis of the experimental Mössbauer spectra obtained from the surface layer of BaFe12O19 50-to 2-nm-thick single crystals reveals that (1) the spectral line widths are close to the natural widths of Mössbauer lines and neither changes nor a set of the values of effective magnetic fields, as well as a paramagnetic state of iron ions, could appear due to a defect such as the “surface,” and (2) the experimental spectra are best described only under the assumption that the surface of a hexaferrite BaFe12O19 single crystal contains a 2-nm-thick layer, in which the magnetic moments of iron ions are deflected through ∼20° from the crystallographic C axis along which the magnetic moments of ions located in the bulk of the crystal are oriented.
Similar content being viewed by others
References
L. Neel, J. Phys. Radium 15, 225 (1954).
J. M. D. Coey, Phys. Rev. Lett. 27, 1140 (1971).
A. H. Morrish, K. Haneda, and P. J. Schurer, J. Phys. Colloque 37(C6), 301 (1976).
A. H. Morrish and K. Haneda, J. Magn. Magn. Mater. 35, 105 (1983).
O. Kubo, T. Ido, and Y. Koike, J. Appl. Phys. 57, 4280 (1985); S. Kuriso, T. Ido, and H. Yokayama, IEEE Trans. Magn. 23, 3137 (1987).
P. Gornert, E. Sinn, W. Schuppel, et al., IEEE Trans. Magn. 26, 12 (1990).
M. Rosler, P. Gornert, and E. Sinn, Z. Phys. D 19, 279 (1991); P. Gornert, H. Pfeiffer, E. Sinn, et al., IEEE Trans. Magn. 30, 714 (1994).
K. Haneda and A. H. Morrish, J. Appl. Phys. 63, 4258 (1988); K. Haneda and A. H. Morrish, IEEE Trans. Magn. 25, 2597 (1989).
K. Haneda, H. Kojima, A. H. Morrish, et al., J. Appl. Phys. 53, 2686 (1982).
F. T. Parker and A. E. Berkowitz, Phys. Rev. B 44, 7437 (1991).
F. T. Parker, M. W. Foster, D. T. Margulis, et al., Phys. Rev. B 47, 7885 (1993).
G. S. Krinchik, A. P. Khrebtov, A. A. Askochenskii, et al., Pis’ma Zh. Éksp. Teor. Fiz. 17, 466 (1973) [JETP Lett. 17, 335 (1973)].
G. S. Krinchik and V. E. Zubov, Zh. Éksp. Teor. Fiz. 69, 707 (1975) [Sov. Phys. JETP 42, 359 (1975)].
V. G. Labushkin, V. V. Rudenko, É. R. Sarkisov, et al., Pis’ma Zh. Éksp. Teor. Fiz. 34, 568 (1981) [JETP Lett. 34, 544 (1981)].
V. E. Zubov, G. S. Krinchik, V. N. Seleznev, et al., Zh. Éksp. Teor. Fiz. 94, 290 (1988) [Sov. Phys. JETP 67, 2122 (1988)]; V. E. Zubov, G. S. Krinchik, V. N. Seleznev, et al., J. Magn. Magn. Mater. 86, 105 (1990).
E. A. Balykina, E. A. Gan’shina, and G. S. Krinchik, Zh. Éksp. Teor. Fiz. 93, 1879 (1987) [Sov. Phys. JETP 66, 1073 (1987)]; Fiz. Tverd. Tela (Leningrad) 30, 570 (1988) [Sov. Phys. Solid State 30, 326 (1988)].
A. S. Kamzin, V. P. Rusakov, and L. A. Grigoriev, in Proc. Intern. Conf. on Physics of Transition Metals (USSR) (1988), Part II.
A. S. Kamzin and L. A. Grigor’ev, Pis’ma Zh. Tekh. Fiz. 16, 38 (1990) [Sov. Tech. Phys. Lett. 16 (1990)].
A. S. Kamzin and L. A. Grigor’ev, Pis’ma Zh. Éksp. Teor. Fiz. 57, 543 (1993) [JETP Lett. 57, 557 (1993)]; Zh. Éksp. Teor. Fiz. 104, 3489 (1993) [JETP 77, 658 (1993)].
A. S. Kamzin, L. P. Ol’khovik, and V. L. Rozenbaum, Pis’ma Zh. Éksp. Teor. Fiz. 61, 916 (1995) [JETP Lett. 61, 936 (1995)]; J. Magn. Magn. Mater. 161, 139 (1996); Zh. Éksp. Teor. Fiz. 111, 1426 (1997) [JETP 84, 788 (1997)].
E. Moll and E. Kankeleit, Nukleonik 7, 180 (1965).
B. Stahl, R. Gellert, O. Geiss, et al., GSI Scientific Report, 180 (1994).
R. Gellert, O. Geiss, G. Klingelhofer, et al., Nucl. Instrum. Methods Phys. Res. B 76, 381 (1993).
Sh. Sh. Bashkirov, A. B. Liberman, and V. I. Sinyavskii, Magnetic Microstructure of Ferrites (Kazan. Univ., Kazan, 1978).
Chemical Applications of Mössbauer Spectroscopy, Ed. by V. Gol’danskii and R. Herber (New York, 1968; Mir, Moscow, 1970).
Author information
Authors and Affiliations
Additional information
__________
Translated from Fizika Tverdogo Tela, Vol. 42, No. 5, 2000, pp. 873–878.
Original Russian Text Copyright © 2000 by Kamzin, Stahl, Gellert, Klingelhofer, Kankeleit, Ol’khovik, Vcherashni\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\).
Rights and permissions
About this article
Cite this article
Kamzin, A., Stahl, B., Gellert, R. et al. Depth-selective conversion-electron Mössbauer spectroscopy of the surface of Ba-M hexaferrite single crystals. Phys. Solid State 42, 897–902 (2000). https://doi.org/10.1134/1.1131309
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1134/1.1131309