Abstract
The spectra of the mean free paths l(ν) of edge dislocations have been studied in NaCl crystals exposed in the electron paramagnetic resonance scheme to the crossed magnetic fields: the Earth’s field (50 μT) and the pump field (2.5 μT, 5–440 kHz). The spectra have been measured for a series of angles θ = 0°–5° of rotation of the sample around its edge [100] with respect to the Earth’s field. The fine structure of the spectra contains a series of peaks whose resonance frequencies are described by the empirical expression v ± i = Asin(θ ± Δθ i ) ≈ A(θ ± Δθ i ). The parameters Δθ i are independent of the angle θ within the experimental errors. Within the model of “frozen” magnetic moments associated with impurity center Ca+-Cl0, the angles Δθ i characterize the deviation of the axis of the center from the 〈100〉 direction in the core of a dislocation. These angles can be expressed in terms of the spectra obtained: Δθ i = (− + i − v − i )/2A. The computer simulation of the edge dislocation core provides the set of the angles Δθ i close to the measured values. The spin-lattice relaxation time of the center on dislocation has been estimated from the low-frequency edge of the spectrum l(ν) as τ s − l ∼ 10−4 s.
Similar content being viewed by others
References
V. I. Alshits, E. V. Darinskaya, T. M. Perekalina, and A. A. Urusovskaya, Fiz. Tverd. Tela 29, 467 (1987) [Sov. Phys. Solid State 29, 265 (1987)].
Yu. I. Golovin, R. B. Morgunov, V. E. Ivanov, S. E. Zhu- likov, and A. A. Dmitrievskii, JETP Lett. 68, 426 (1998).
V. I. Alshits, E. V. Darinskaya, V. A. Morozov, V. M. Kats, and A. A. Lukin, JETP Lett. 91, 91 (2010).
V. I. Alshits, E. V. Darinskaya, M. V. Koldaeva, and E. A. Petrzhik, Phys. Solid State 55, 324 (2013).
V. I. Alshits, E. V. Darinskaya, M. V. Koldaeva, and E. A. Petrzhik, Crystallogr. Rep. 48, 768 (2003).
Yu. I. Golovin, Phys. Solid State 46, 789 (2004).
R. B. Morgunov, Phys. Usp. 47, 125 (2004).
V. I. Alshits, E. V. Darinskaya, M. V. Koldaeva, and E. A. Petrzhik, in Dislocations in Solids, Ed. by J. P. Hirth (Elsevier, Amsterdam, 2008), vol. 14, p. 333.
Ya. B. Zeldovich, A. L. Buchachenko, and E. L. Frankevich, Usp. Fiz. Nauk 155, 3 (1988) [Sov. Phys. Usp. 31, 385 (1988)].
K. M. Salikhov, Yu. N. Molin, R. Z. Sagdeev, and A. L. Buchachenko, Spin Polarization and Magnetic Effects in Radical Reactions (Elsevier, Amsterdam, 1984; Nauka, Novosibirsk, 1978).
U. E. Steiner and T. Ulrich, Chem. Rev. 89, 51 (1989).
V. V. Kveder, Yu. A. Osip’yan, and A. I. Shalynin, Zh. Eksp. Teor. Fiz. 83, 699 (1982) [Sov. Phys. JETP 56, 395 (1982)].
V. L. Berdinskii, Sov. Phys. JETP 64, 1260 (1986).
X. W. Zhou, F. P. Doty, and P. Yang, Comp. Mater. Sci. 50, 2470 (2011).
A. Yu. Belov, Kristallografiya 32, 550 (1987) [Sov. Phys. Crystallogr. 32, 320 (1987)].
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © V.I. Alshits, M.V. Koldaeva, E.A. Petrzhik, A.Yu. Belov, E.V. Darinskaya, 2014, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2014, Vol. 99, No. 2, pp. 87–93.
Rights and permissions
About this article
Cite this article
Alshits, V.I., Koldaeva, M.V., Petrzhik, E.A. et al. Determination of the positions of impurity centers in a dislocation core in a NaCl crystal from magnetoplasticity spectra. Jetp Lett. 99, 82–88 (2014). https://doi.org/10.1134/S0021364014020039
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0021364014020039