Abstract
It is shown in the framework of the generalized mean-field approximation taking into account spatial fluctuations of the local magnetic field that the collective effect of dipole interaction in a random 3D system of identical (rodlike) magnetic nanoparticles with parallel easy magnetization axes shifts the relaxation magnetization curves towards shorter times (i.e., accelerates the relaxation process). In addition, the course of this process depends (via the demagnetizing field) on the sample shape. The interaction between nanograins affects the magnetization relaxation of a random 2D system only when the magnetic moments of the grains are perpendicular to the plane of the system.
Similar content being viewed by others
References
J. L. Dormann, D. Fiorani, and E. Tronc, J. Magn. Magn. Mater. 202, 251 (1999).
S. L. Ginzburg, Irreversible Processes in Spin Glasses (Nauka, Moscow, 1989).
E. Z. Meilikhov, Zh. Éksp. Teor. Fiz. 117, 1136 (2000) [JETP 90, 987 (2000)].
V. V. Rylkov, B. A. Aronzon, A. B. Davydov, et al., Zh. Éksp. Teor. Fiz. 121, 908 (2002) [JETP 94, 779 (2002)].
D. K. Lottis, R. M. White, and E. Dan Dahlberg, Phys. Rev. Lett. 67, 362 (1991).
S. I. Denisov and K. N. Trohidou, Phys. Rev. B 64, 184433 (2001).
S. I. Denisov, T. V. Lyutyy, and K. N. Trohidou, Phys. Rev. B 67, 014411 (2003).
H.-B. Braun, Phys. Rev. Lett. 71, 3557 (1993).
M. Lederman, S. Shulz, and M. Ozaki, Phys. Rev. Lett. 73, 1986 (1994).
L. NÉel, Ann. Geophys. (C.N.R.S.) 5, 99 (1949).
C. Kittel, Introduction to Solid State Physics, 7th ed. (Wiley, New York, 1996; Nauka, Moscow, 1978).
H. Mueller, Phys. Rev. 47, 947 (1935).
H. Mueller, Phys. Rev. 50, 547 (1936).
E. Z. Meilikhov and R. M. Farzetdinova, Zh. Éksp. Teor. Fiz. 122, 1027 (2002) [JETP 95, 886 (2002)].
E. Z. Meilikhov, Zh. Éksp. Teor. Fiz. 124, 650 (2003) [JETP 97, 587 (2003)].
E. Z. Meilikhov and R. M. Farzetdinova, Zh. Éksp. Teor. Fiz. 124, 656 (2003) [JETP 97, 593 (2003)].
A. Aharoni, IEEE Trans. Magn. 23, 1853 (1987).
Vik. S. Dotsenko, Usp. Fiz. Nauk 165, 481 (1995) [Phys. Usp. 38, 457 (1995)].
R. G. Palmer, D. L. Stein, E. Abrahams, and P. W. Anderson, Phys. Rev. Lett. 53, 958 (1984).
Author information
Authors and Affiliations
Additional information
__________
Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 125, No. 6, 2004, pp. 1367–1374.
Original Russian Text Copyright © 2004 by Meilikhov, Farzetdinova.
Rights and permissions
About this article
Cite this article
Meilikhov, E.Z., Farzetdinova, R.M. Magnetic relaxation in a random system of interacting rodlike nanoparticles. J. Exp. Theor. Phys. 98, 1198–1204 (2004). https://doi.org/10.1134/1.1777632
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1777632