Mössbauer study of La0.75Ca0.25Mn0.98Fe0.02O3 compound

作者: G. Kallias , D. Niarchos , A. Simopoulos , E. Devlin , M. Pissas

DOI: 10.1063/1.364722

关键词:

摘要: A thorough study of the Mossbauer spectra (MS) a lightly iron doped (2%) polycrystalline La0.75Ca0.25MnO3 compound has been carried out from T=4.2 K up to 300 K. The MS for T>Tc and at show one component. corresponding hyperfine parameters are compatible with S=5/2 Fe3+ in octahedral coordination. As temperature increases 4.2 consist several broad sextets doublets (especially Tc). This first reported behavior resembles that ferromagnetic clusters.

参考文章(6)
P. Schiffer, A. P. Ramirez, W. Bao, S-W. Cheong, Low Temperature Magnetoresistance and the Magnetic Phase Diagram ofLa1−xCaxMnO3 Physical Review Letters. ,vol. 75, pp. 3336- 3339 ,(1995) , 10.1103/PHYSREVLETT.75.3336
P. G. Radaelli, D. E. Cox, M. Marezio, S -W. Cheong, P. E. Schiffer, A. P. Ramirez, Simultaneous structural, magnetic, and electronic transitions in La1-xCaxMnO3 with x=0.25 and 0.50. Physical Review Letters. ,vol. 75, pp. 4488- 4491 ,(1995) , 10.1103/PHYSREVLETT.75.4488
S. Jin, T. H. Tiefel, M. McCormack, R. A. Fastnacht, R. Ramesh, L. H. Chen, Thousandfold Change in Resistivity in Magnetoresistive La-Ca-Mn-O Films Science. ,vol. 264, pp. 413- 415 ,(1994) , 10.1126/SCIENCE.264.5157.413
A. P. Ramirez, P. Schiffer, S-W. Cheong, C. H. Chen, W. Bao, T. T. M. Palstra, P. L. Gammel, D. J. Bishop, B. Zegarski, Thermodynamic and electron diffraction signatures of charge and spin ordering in La1-xCaxMnO3 Physical Review Letters. ,vol. 76, pp. 3188- 3191 ,(1996) , 10.1103/PHYSREVLETT.76.3188
J. W. Lynn, R. W. Erwin, J. A. Borchers, Q. Huang, A. Santoro, J-L. Peng, Z. Y. Li, Unconventional Ferromagnetic Transition in La 1 − x Ca x MnO 3 Physical Review Letters. ,vol. 76, pp. 4046- 4049 ,(1996) , 10.1103/PHYSREVLETT.76.4046