Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-19T13:22:33.006Z Has data issue: false hasContentIssue false
  • English
  • Français

Powder X-ray diffraction and Rietveld analysis of La1−xCaxMnO3(0<X<1)

Published online by Cambridge University Press:  01 March 2012

P. R. Sagdeo ,
Shahid Anwar  and
N. P. Lalla
P. R. Sagdeo*
Affiliation:
UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore-452017, India
Shahid Anwar
Affiliation:
UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore-452017, India
N. P. Lalla
Affiliation:
UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore-452017, India
*
a)Electronic mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Single-phase samples of La1−xCaxMnO3 compounds have been synthesized by solid-state reaction. Detailed Rietveld analysis of powder X-ray diffraction data showed that La1−xCaxMnO3 undergoes a structural phase transformation from R-3c to Pnma at X=0.05–0.075. There is a linear variation of lattice parameters as a function of calcium concentration. The slope of this linear variation changes at X=0.6. A correlation between observed Mn-O bond lengths, corresponding to different compositions, and possible magnetic phases is discussed.

Keywords

manganitesX-ray powder diffractioncrystal structureRietveld method
Type
Technical Articles
Information
Powder Diffraction , Volume 21 , Issue 1 , March 2006 , pp. 40 - 44
Copyright
Copyright © Cambridge University Press 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bindu, R. (2004). “Structural studies of La1−xSrxMnO3+δ(x=0.1−1.0),” Eur. Phys. J. B EPJBFY 37, 321–327.CrossRefGoogle Scholar
Booth, C. H., Bridges, F., Kwei, G. H., Lawrence, J. M., Cornelius, A. L., and Neumeier, J. J. (1998). “Direct relationship between magnetism and MnO6 distortions in La1−xCaxMnO3,” Phys. Rev. Lett. PRLTAO 10.1103/PhysRevLett.80.853 80, 853–856.CrossRefGoogle Scholar
Dabrowski, B., Dybzinski, R., Bukowski, Z., Chmaissem, O., and Jorgensen, J. D. (1999). “Oxygen content and structures of La1−xCaxMnO3+d as a function of synthesis conditions,” J. Solid State Chem. JSSCBI 10.1006/jssc.1999.8389 146, 448–457.CrossRefGoogle Scholar
Goodenough, J. B. (1998). “Jahn-Teller phenomena in solids,” Annu. Rev. Mater. Sci. ARMSCX 10.1146/annurev.matsci.28.1.1 28, 1–27.CrossRefGoogle Scholar
Hemberger, J., Krimmel, A., Kurz, T., Krug von Nidda, H.-A., Ivanov, V. Yu., and Mukhin, A. A. (2002). “Structural, magnetic, and electrical properties of single-crystalline La1−xSrxMnO3(0.4<x<0.85),” Phys. Rev. B PRBMDO 66, 094410(1)–094410(8).CrossRefGoogle Scholar
Pissas, M. and Kallias, G. (2003). “Phase diagram of the La1−xCaxMnO3 compound 0.5⩽x⩽0.9,” Phys. Rev. B PRBMDO 68, 134414(1)–134414(9).CrossRefGoogle Scholar
Pissas, M. and Papavassiliou, G. J. (2004), “The phase diagram and magnetic properties of La1−xCaxMnO3 compounds for (0⩽x⩽0.23),” J. Phys.: Condens. Matter JCOMEL 10.1088/0953-8984/16/36/018 16, 6527–6540.Google Scholar
Radaelli, P. G., Cox, D. E., Marezio, M., Cheong, S-W., Schiffer, P. E., and Ramirez, A. P. (1995). “Simultaneous structural, magnetic, and electronic transitions in La1−xCaxMnO3 with x=0.25 and 0.50,” Phys. Rev. Lett. PRLTAO 10.1103/PhysRevLett.75.4488 75, 4488–4491.CrossRefGoogle ScholarPubMed
Radaelli, P. G., Iannone, G., Marezio, M., Hwang, H. Y., Cheong, S-W., Jorgensen, J. D., and Argyriou, D. N. (1997). “Structural effects on the magnetic and transport properties of perovskite A1−xAxMnO3(x=0.25,0.30),” Phys. Rev. B PRBMDO 10.1103/PhysRevB.56.8265 56, 8265–8276.CrossRefGoogle Scholar
Rao, C. N. R. and Raveau, B. (1998). Colossal Magnetoresistance Charge Ordering and Related Properties of Manganese Oxides (World Scientific, Singapore).CrossRefGoogle Scholar
Rodriguez-Carvajal, J. (1993). “Recent advances in magnetic structure determination by neutron powder diffraction,” Physica B PHYBE3 10.1016/0921-4526(93)90108-I 192, 55–69.CrossRefGoogle Scholar
Salamon, M. B., and Jaime, M. (2001). “The physics of manganites: Structure and transport,” Rev. Mod. Phys. RMPHAT 10.1103/RevModPhys.73.583 73, 583–628.CrossRefGoogle Scholar
Schiffer, P., Ramirez, A. P., Bao, W., and Cheong, S-W. (1995). “Low temperature magnetoresistance and the magnetic phase diagram of La1−xCaxMnO3,” Phys. Rev. Lett. PRLTAO 75, 336–3339.CrossRefGoogle ScholarPubMed
Solovyev, I., Hamada, N., and Terakura, K. (1996). “Crucial role of the lattice distortion in the magnetism of LaMnO3,” Phys. Rev. Lett. PRLTAO 10.1103/PhysRevLett.76.4825 76, 4825–4828.CrossRefGoogle ScholarPubMed
Tokura, Y. (2000). Colossal Magneto-resistive Oxides (Gordon and Breach, New York).CrossRefGoogle Scholar
Van der Pauw, L. J. (1958). “A method of measuring the resistivity and Hall coefficient on lamellae of arbitrary shape,” Philips Tech. Rev. PTREAN 20, 220–224.Google Scholar
Volger, J. (1954). “Further experimental investigations on some ferromagnetic oxidic compounds of manganese with perovskite structure,” Physica (Utrecht) PHYSAG 10.1016/S0031-8914(54)80015-2 20, 49–66.CrossRefGoogle Scholar
Wollan, E. O. and Koehler, W. C. (1955). “Neutron diffraction study of the magnetic properties of the series of perovskite-type compounds [(1−x)La,xCa]MnO3,” Phys. Rev. PHRVAO 10.1103/PhysRev.100.545 100, 545–563.CrossRefGoogle Scholar
Yakel, H. L. Jr. (1955). “On the structures of some compounds of the perovskite type,” Acta Crystallogr. ACCRA9 10.1107/S0365110X55001291 8, 394–398.CrossRefGoogle Scholar