Regensburg 2010 – wissenschaftliches Programm

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KR: Fachverband Kristallographie

KR 10: Poster: Multiferroics (with MA, DF, KR, DS)

KR 10.78: Poster

Dienstag, 23. März 2010, 10:45–13:45, Poster A

Magnetic and Structural Properties of La_1−xTh_xCrO₃ and LaCr_1−yTi_yO₃ — •P. Reuvekamp¹, R. K. Kremer¹, and F. S. Razavi² — ¹Max Planck Institut fuer Festkoerperforschung, — ²Department of Physics, Brock University, St. Catharines, Ontario, L2S 3A1, Canada

The magnetic properties of ceramic samples of La_1−xTh_xCrO₃ and LaCr_1−y Ti_yO₃ were investigated. In order to improve the chemical homogeneity and stoichiometry, the ceramic samples were prepared by the citrate-pyrolysis synthesis route. X-ray investigations of these samples revealed that all the phases maintained their orthorhombic structure, however with different mass densities. The substitution of Th for La does not have effect on the magnetic properties of LaCrO₃ with the Néel temperature remaining close to 290 K whereas, replacing Ti for Cr reduces the Néel temperature to a minimum of 237 K for y = 0.2.