Discovery of giant volume magnetostriction at room temperature in La_{1-x}Ba_{x}MnO_{3} manganites

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Demin, Roman^{a; *} | Koroleva, Lioudmila^a | Zashchirinski, Denis^a | Kozlov, Aleksey^a | Mukovskii, Yakov^b | Glazyirin, Konstantin^b

Affiliations: [a] M.V. Lomomosov Moscow State University, Leninskie Gory, 119992 Moscow, Russia | [b] Moscow State Steel and Alloys Institute, Leninskii str. 4, 119049, Russia

Correspondence: [*] Corresponding author. Tel.: +7 095 939 28 47; Fax: +7 095 932 88 20; E-mail: [email protected]

Abstract: Giant volume magnetostriction ω is found in La_{1-x}Ba_{x}MnO_{3} manganites attained of 4 × 10^{-4} in a magnetic field H=8.2 kOe near Curie point T_{C}. In La_{0.7}Ba_{0.3}MnO_{3} ω achieves of giant value of 2.54 × 10^{-4} at temperature T=300 K. Volume magnetostriction and magnetoresistance exhibit similar dependence on T and H in T_{C} – region that is explained by the presence in these single crystals of magnetic two-phase ferromagnetic – antiferromagnetic state due to strong s-d exchange.

Keywords: Thermal expansion, volume magnetostriction, colossal magnetoresistance, manganite

DOI: 10.3233/JAE-2007-844

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 13-17, 2007