Abstract
The phase diagram of ferromagnetic alloys Ni2+x Mn1−x Ga is reconstructed on the basis of temperature dependences of the resistance. It is seen from this diagram that for small x, structural transitions from the cubic to the tetragonal phase are preceded by structural transformations in the cubic phase. In the framework of the phenomenological Landau theory of phase transitions, phase diagrams of the structural and magnetic phase transitions in these alloys are analyzed with regard for the modulation order parameter. It is shown that premartensitic and postmartensitic phase transitions related to the appearance of the modulated structure can occur along with martensitic transformations. The strain and modulation order parameters substantially affect the magnetic phase transitions via the interaction with the magnetic order parameter.
Similar content being viewed by others
References
S. J. Murray, M. Marioni, S. M. Allen, et al., Appl. Phys. Lett. 77, 886 (2000).
V. S. Boiko, R. I. Garber, and A. M. Kosevich, Reversible Crystal Plasticity (Nauka, Moscow, 1991).
M. F. Fradkin, Phys. Rev. B 50, 16326 (1994).
A. N. Vasil’ev, V. V. Kokorin, Yu. I. Savchenko, and V. A. Chernenko, Zh. Éksp. Teor. Fiz. 98, 1437 (1990) [Sov. Phys. JETP 71, 803 (1990)].
A. D. Bozhko, A. N. Vasil’ev, V. V. Khovailo, et al., Pis’ma Zh. Éksp. Teor. Fiz. 67, 212 (1998) [JETP Lett. 67, 227 (1998)].
V. D. Buchel’nikov, A. N. Vasil’ev, I. E. Dikshtein, et al., Fiz. Met. Metalloved. 85, 5 (1998).
V. D. Buchel’nikov, A. N. Vasil’ev, I. E. Dikshtein, and V. G. Shavrov, Fiz. Met. Metalloved. 85, 54 (1998).
V. D. Buchel’nikov, A. N. Vasil’ev, A. T. Zayak, et al., Vestn. Chelyabinsk. Gos. Univ., Ser. 6: Fiz. 1, 20 (1998).
V. D. Buchel’nikov, A. N. Vasil’ev, I. E. Dikshtein, and V. G. Shavrov, Vestn. Chelyabinsk. Gos. Univ., Ser. 6: Fiz. 1, 5 (1998).
V. D. Buchelnikov, V. S. Romanov, and A. T. Zayak, J. Magn. Magn. Mater. 191(1–2), 203 (1999).
A. N. Vasil’ev, A. D. Bozhko, V. V. Khovailo, et al., Phys. Rev. B 59, 1113 (1999).
A. D. Bozhko, A. N. Vasil’ev, V. V. Khovailo, et al., Zh. Éksp. Teor. Fiz. 115, 1740 (1999) [JETP 88, 954 (1999)].
A. Zheludev, S. M. Shapiro, and P. Wochner, Phys. Rev. B 54, 15045 (1996).
J. A. Krumhansl and R. J. Gooding, Phys. Rev. B 39, 3047 (1989).
A. Planes, E. Obrado, A. Gonzales-Comas, and L. Manosa, Phys. Rev. Lett. 79, 3926 (1997).
R. J. Gooding and J. A. Krumhansl, Phys. Rev. B 38, 1695 (1988).
P. J. Webster, K. P. A. Ziebeck, S. L. Town, and M. S. Peak, Philos. Mag. 49, 295 (1984).
V. V. Kokorin, V. V. Martynov, and V. A. Chernenko, Fiz. Tverd. Tela (Leningrad) 33, 1250 (1991) [Sov. Phys. Solid State 33, 708 (1991)].
A. Zheludev, S. M. Shapiro, P. Wochner, et al., Phys. Rev. B 51, 11310 (1995).
F. Zuo, X. Su, and K. H. Wu, Phys. Rev. B 58, 11127 (1998).
V. A. L’vov, E. V. Gomonaj, and V. A. Chernenko, J. Phys.: Condens. Matter 10, 4587 (1998).
T. Castan, E. Vives, and P.-A. Lindgard, Phys. Rev. B 60, 7071 (1999).
I. A. Folkins and M. B. Walker, Phys. Rev. B 40, 255 (1989).
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. 119, No. 6, 2001, pp. 1166–1175.
Original Russian Text Copyright © 2001 by Buchel’nikov, Zayak, Vasil’ev, Dalidovich, Shavrov, Takagi, Khovailo.
Rights and permissions
About this article
Cite this article
Buchel’nikov, V.D., Zayak, A.T., Vasil’ev, A.N. et al. Phase transitions in ferromagnetic Ni2+x Mn1−x Ga alloys with regard for the modulation order parameter. J. Exp. Theor. Phys. 92, 1010–1018 (2001). https://doi.org/10.1134/1.1385642
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1385642