Abstract
The magnetic and crystal structures of anion-deficient La0.7Sr0.3MnO3−d manganites (d = 0.15 and 0.20) are studied by neutron diffraction in the range of high pressures 0–5 GPa and temperatures 10–300 K. It is found that a spin-glass state forms in La0.7Sr0.3MnO2.85 below T g ∼ 50 K, while magnetic phase separation is observed in La0.7Sr0.3MnO2.80, which is characterized by the coexistence of AFM domains of the C type with spin-glass domains. As distinct from the stoichiometric A0.5Ba0.5MnO3 manganites (A = Nd, Sm), in which the high-pressure effect suppresses the spin-glass state and gives rise to ferromagnetism, the spin-glass state in La0.7Sr0.3MnO2.85 is stable under pressure. The bulk modulus of La0.7Sr0.3MnO2.85 is considerably smaller than that for the stoichiometric La0.7Sr0.3MnO3 compound. The causes of the formation of different types of the magnetic structure in La0.7Sr0.3MnO3−d (d = 0.15 and 0.20) and different high-pressure effects on the magnetic structure of stoichiometric and anion-deficient manganites are analyzed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
E. Dagotto, T. Hotta, and A. Moreo, Phys. Rep. 344, 1 (2001).
M. B. Salamon and M. Jaime, Rev. Mod. Phys. 73, 583 (2001).
A. Urushibara, Y. Moritomo, T. Arima, et al., Phys. Rev. B 51, 14 103 (1995).
S. V. Trukhanov, Zh. Éksp. Teor. Fiz. 127, 107 (2005) [JETP 100, 95 (2005)].
S. V. Trukhanov, I. O. Troyanchuk, and A. V. Trukhanov, Pis’ma Zh. Éksp. Teor. Fiz. 84, 310 (2006) [JETP Lett. 84, 254 (2006)].
N. Takeshita, C. Terakura, D. Akahoshi, et al., Phys. Rev. B 69, 180405 (2004).
S. V. Trukhanov, I. O. Troyanchuk, and A. V. Trukhanov, Pis’ma Zh. Éksp. Teor. Fiz. 83, 36 (2006) [JETP Lett. 83, 33 (2006)].
V. L. Aksenov, A. M. Balagurov, V. P. Glazkov, et al., Physica B (Amsterdam) 265, 258 (1999).
V. P. Glazkov and I. N. Goncharenko, Fiz. Tekh. Vys. Davleniĭ 1, 56 (1991).
V. B. Zlokazov and V. V. Chernyshev, J. Appl. Crystallogr. 25, 447 (1992).
J. Rodriguez-Carvajal, Physica B (Amsterdam) 192, 55 (1993).
D. P. Kozlenko, I. N. Goncharenko, B. N. Savenko, and V. I. Voronin, J. Phys.: Condens. Matter 16, 6755 (2004).
D. P. Kozlenko, V. P. Glazkov, Z. Jirak, and B. N. Savenko, J. Phys.: Condens. Matter 16, 2381 (2004).
R. Kajimoto, H. Yoshizawa, H. Kawano, et al., Phys. Rev. B 60, 9506 (1999).
Z. Fang, I. V. Solovyev, and K. Terakura, Phys. Rev. Lett. 84, 3169 (2000).
F. J. Birch, J. Geophys. Res. 91, 4949 (1986).
Author information
Authors and Affiliations
Additional information
Original Russian Text © D.P. Kozlenko, S.V. Trukhanov, E.V. Lukin, I.O. Troyanchuk, B.N. Savenko, V.P. Glazkov, 2007, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 85, No. 2, pp. 123–127.
Rights and permissions
About this article
Cite this article
Kozlenko, D.P., Trukhanov, S.V., Lukin, E.V. et al. Oxygen-deficiency and high-pressure effects on the magnetic and crystal structures of La0.7Sr0.3MnO3−d managanites. Jetp Lett. 85, 113–117 (2007). https://doi.org/10.1134/S002136400702004X
Received:
Issue Date:
DOI: https://doi.org/10.1134/S002136400702004X