Possibility of observing chiral-symmetry effects in ferromagnetic nanoparticles
Tóm tắt
The statistics of left-and right-handed vortical magnetization states in a system of submicron-sized ferromagnetic disks is studied experimentally. Lattices of elliptic cobalt particles with a planar size of 750 × 450 nm and a thickness of 25 nm were formed using high-resolution electronic lithography. To visualize the magnetization distributions in the disks, magnetic force microscopy was used. The experimental results indicate the conservation of magnetic chiral symmetry in cobalt ferromagnetic particles of the above size and shape.
Tài liệu tham khảo
S. S. Parkin, K. P. Roche, M. G. Samant, P. M. Rice, R. B. Bayers, R. E. Scheuerlein, E. J. Sullivan, S. L. Brown, J. Bucchigano, D. W. Abraham, Y. Lu, M. Rooks, P. L. Trouilloud, R. A. Wanner, and W. J. Gallagher, J. Appl. Phys. 85, 5828 (1999).
J. N. Chapman, R. P. Aitchison, K. J. Kirk, S. McVitie, J. C. Kools, and M. F. Gillies, J. Appl. Phys. 83, 5321 (1998).
S. N. Vdovichev, B. A. Gribkov, S. A. Gusev, E. Il’ichev, A. Yu. Klimov, Yu. N. Nozdrin, G. L. Pakhomov, V. V. Rogov, R. Stolz, and A. A. Fraerman, Pis’ma Zh. Éksp. Teor. Fiz. 80(10), 758 (2004) [JETP Lett. 80 (10), 651 (2004)].
D. J. Morgan and J. B. Ketterson, Phys. Rev. Lett. 80, 3614 (1998).
D. Y. Vodolazov, B. A. Gribrkov, S. A. Gusev, A. Yu. Klimov, Yu. N. Nozdrin, V. V. Rogov, and S. N. Vdovichev, Phys. Rev. B: Condens. Matter 72, 064509 (2005).
N. Weiss, T. Cren, M. Epple, S. Rusponi, G. Baudot, S. Rohart, A. Tejeda, V. Repain, S. Rousset, P. Ohresser, F. Scheurer, P. Bencok, and H. Brune, Phys. Rev. Lett. 95, 157204 (2005).
A. A. Fraerman, S. A. Gusev, I. R. Karetnikova, L. A. Mazo, I. M. Nefedov, Yu. N. Nozdrin, M. V. Sapozhnikov, I. A. Shereshevsky, and L. A. Suhodoev, Phys. Rev. B: Condens. Matter 65, 64424 (2002).
J. M. Vargas, W. C. Nunes, L. M. Socolovsky, M. Knobel, and D. Zanchet, Phys. Rev. B: Condens. Matter 72, 184428 (2005).
G. Gubbiotti, G. Carlotti, T. Okuno, M. Grimsditch, L. Giovannini, F. Montoncello, and F. Nizzoli, Phys. Rev. B: Condens. Matter 72, 184419 (2005).
R. P. Cowburn, D. K. Koltsov, A. O. Adeyeye, M. E. Welland, and D. M. Ticcker, Phys. Rev. Lett. 83, 1042 (1999).
I. E. Dzyaloshinskiĭ, Zh. Éksp. Teor. Fiz. 32, 1547 (1957) [Sov. Phys. JETP 5, 1259 (1957)].
T. Moriya, Phys. Rev. Lett. 4, 228 (1960).
L. D. Landau and E. M. Lifshitz, Course of Theoretical Physics, Vol. 8: Electrodynamics of Continuous Media (Nauka, Moscow, 1982; Pergamon, Oxford, 1984).
A. N. Bogdanov and U. K. Robler, Phys. Rev. Lett. 87, 037 203 (2001).
S. N. Vdovichev, A. N. Gospodchikov, B. A. Gribkov, and S. A. Gusev, in Proceedings of the X Symposium “Nanophysics and Nanoelectronics-2005,” Nizhni Novgorod, Russia 2005 (Nizhni Novgorod, 2005), Vol. 1, p. 171 [in Russian].
http://math.nist.gov/oommf.
A. Fernandez and C. J. Cerjan, J. Appl. Phys. 87, 1395 (2000).
A. A. Fraerman, B. A. Gribkov, S. A. Gusev, V. L. Mironov, and S. N. Vdovichev, in Proceedings of the International Workshop on Scanning Probe Microscope, “SPM-2004,” Nizhni Novgorod, Russia, 2004 (Nizhni Novgorod, 2004), p. 201.
M. Grimsditch, P. Vavassori, V. Novosad, V. Metlushko, H. Shima, Y. Otani, and K. Fukamichi, Phys. Rev. B: Condens. Matter 65, 172419 (2002).
M. Schneider, H. Hoffmann, and J. Zweck, Appl. Phys. Lett. 79, 3113 (2001).
S. A. Gusev, L. A. Mazo, and S. N. Vdovichev, in Physics, Chemistry, and Application of Nanostructures: Reviews and Shot Notes to Nanomeeting-2005, Ed by V. E. Borisenko, S. V. Gaponenko, and V. S. Gurin (World Sci., Singapore, 2005), p. 471.
D. J. Hudson, Statistics: Lectures on Elementary Statistics and Probability (CERN, Geneva, 1964; Mir, Moscow, 1967).