Abstract
The behavior of the surface and near-surface layers of macroscopic FeBO3 single crystals is studied over the temperature range from 291 K to Neél temperature (T N ) using depth-selective conversion-electron Mössbauer spectroscopy. Three different phases or states, namely, an antiferromagnetically ordered phase (similar to the crystal bulk state), a surface phase, and a transition layer between them coexist near the Neél point in a surface layer ∼500 nm thick. The critical parameters found for the bulk phase agree well with the theoretical critical index νth≅0.63 predicted by the 3D Ising model. As the crystal surface is approached, the critical parameter β increases to 0.51(2) but remains smaller than the value of β=0.8 for the surface of a semi-infinite Heisenberg model. Therefore, the effective dimensionality of the system, being equal to 3 in the bulk, decreases at the crystal surface.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
M. I. Kaganov and A. M. Omel'yanchuk, Zh. Éksp. Teor. Fiz. 61, 1679 (1971) [Sov. Phys. JETP 34, 895 (1972)].
D. L. Mills, Phys. Rev. B 3, 3887 (1971).
K. Binder, in Phase Transitions and Critical Phenomena, Ed. by C. Domb and J. L. Lebowitz (Academic, New York, 1983), Vol. 8.
T. Kaneyoshi, J. Phys. C 3, 4497 (1991).
A. J. Freeman and Ru-qian Wu, J. Magn. Magn. Mater. 100, 497 (1991).
H. Dosch, Critical Phenomena at Surfaces and Interfaces: Evanescent X-ray and Neutron Scattering (Springer-Verlag, 1992, Springer Tracts Mod. Phys., 1992), vol. 126.
H. W. Diehl, Int. J. Mod. Phys. B 11, 3503 (1997); H. W. Diehl and S. Dietrich, Z. Phys. B 42, 65 (1981); Z. Phys. B 43, 315 (1981).
Studies of Magnetic Properties of Fine Particles and Their Relevance to Materials Science, Ed. by J. L. Dormann and D. Fiorani (Elsevier, Amsterdam, 1992).
T. Shinjo, Surf. Sci. Rep. 12(2), 49 (1991).
R. D. M. Grath, M. R. Mirzababaev, and J. C. Walker, Phys. Lett. A 67, 149 (1978).
P. P. Kovalenko, V. G. Labushkin, É. R. Sarkisov, and I. G. Tolpekin, Fiz. Tverd. Tela (Leningrad) 29, 593 (1987) [Sov. Phys. Solid State 29, 340 (1987)].
A. S. Kamzin and L. A. Grigor'ev, Fiz. Tverd. Tela (St. Petersburg) 36, 1271 (1994) [Phys. Solid State 36, 694 (1994)].
B. Stahl, R. Gellert, M. Muller, et al., Hyperfine Interact. (2000) (in press); A. S. Kamzin, B. Stahl, R. Gellert, et al., Pis'ma Zh. Éksp. Teor. Fiz. 71, 197 (2000) [JETP Lett. 71, 134 (2000)].
T. Yang, A. Krishnan, N. Benczer-Koller, and G. Bayreuther, Phys. Rev. Lett. 48, 1292 (1982).
G. N. Belozersky, Mössbauer Studies of Surface Layers (Elsevier, Amsterdam, 1993); K. Nomura, Y. Ujihira, and A. Vertes, J. Radioanal. Nucl. Chem. 202, 103 (1996).
B. Stahl and E. Kankeleit, Nucl. Instrum. Methods Phys. Res. B 122, 149 (1997).
B. Stahl, R. Gellert, A. Kamzin, et al., J. Phys. IV 7, C1–219 (1997); A. S. Kamzin, B. Stahl, R. Gellert, et al., Fiz. Tverd. Tela (St. Petersburg) 42 (2000) (in press) [Phys. Solid State 42, 897 (2000)].
M. Eibschutz and M. E. Lines, Phys. Rev. B 7, 4907 (1973).
D. M. Wilson and S. Broersma, Phys. Rev. B 14, 1977 (1976).
A. L. Irshinskii, V. P. Ozhogin, V. M. Cherepanov, and S. S. Yakimov, Zh. Éksp. Teor. Fiz. 76, 1111 (1979) [Sov. Phys. JETP 49, 563 (1979)].
Landold-Bernstein, New Series III/12b, 44 (1980).
J. Zinn-Justin, Quantum Field Theory and Crytical Phenomena (Clarendon, Oxford, 1996).
Author information
Authors and Affiliations
Additional information
__________
Translated from Pis'ma v Zhurnal Éksperimental'no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 71, No. 10, 2000, pp. 643–649.
Original Russian Text Copyright © 2000 by Kamzin, Stahl, Kankeleit, Gellert, Muller, Vcherashni\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \).