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LiMn2O4 low-temperature phase: synchrotron and neutron diffraction study (1999)

Massarotti, V. ; Capsoni, D. ; Bini, M. ; [et al.]

Copenhagen : International Union of Crystallography (IUCr)

Applied crystallography online 32 (1999), S. 1186-1189

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ISSN: 1600-5767

Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Topics: Geosciences , Physics

Notes: The structural evolution of LiMn2O4 spinel was followed from 320 K down to 10 K. The structural transformation, recently studied down to 230 K [Rodriguez-Carvajal, Rousse, Masquelier & Hervieu (1998). Phys. Rev. Lett. 81, 4660–4663], takes place near room temperature with a significant hysteresis: the high-temperature cubic phase transforms to a superstructure orthorhombic cell. The present study indicates that the nuclear structure is stable down to 10 K, while neutron diffraction patterns below 80 K show the rise of a magnetic ordering in the spinel phase. From Mn—O bond-length analysis of the MnO6 octahedra, a temperature-independent charge ordering in the structure can be deduced.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1107/S0021889899011577

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