Consequences of pressure-instigated spin crossover in RFeO3 perovskites; a volume collapse with no symmetry modification

Europhysics Letters

Volumn 71, Issue 2, 2005, Pages 228-234

  Rozenberg, G Kh ^a   Pasternak, M P ^a   Xu, W M ^a   Dubrovinsky, L S ^b   Carlson, S ^c   Taylor, R D ^d  

^a TEL AVIV UNIVERSITY   (Israel)

^b UNIVERSITÄT BAYREUTH   (Germany)

^c EUROPEAN SYNCHROTRON RADIATION FACILITY   (France)

^d LOS ALAMOS NATIONAL LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 22544433723     PISSN: 02955075     EISSN: None     Source Type: Journal    
DOI: 10.1209/epl/i2005-10071-9     Document Type: Article

References (26)

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4. Spin state switching may arise under the influence of a change not only in pressure but also temperature, or irradiation with light. The thermal spin transition has been widely studied for several first-row transition metal complexes, especially complexes of iron (II) and iron (III), where LS and HS states are of nearly equal energies (see GÜTLICH P. et al., Coord. Chem. Rev., 97 (1990) 1;
5. GUETLICH P. et al., Top. Curr. Chem., 233 (2004) 1, and references therein).
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13. 6 octahedra.
14. -1) mode shows that the Pr-ion shifts significantly with pressure rise to 20 GPa whereas the Lu modes barely changes. The transition to HP phase is accompanied by an additional reduction of the lattice distortion.
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19. Because of nearly equal energies of the LS and HS states, the same transition could be driven by pressure of merely a few kbars, see REAL J. A. et al., Coord. Chem. Rev., 236 (2003) 121;
20. KSENOFONTOV V. et al., Top. Curr. Chem., 235 (2004) 23.
21. 0 for the intermediate pressure range, even less than 274 GPa, obtained for LP phase.
22. 3 HP phase for the whole pressure range. But such a description is rather formalistic and does provide an explanation for the V(P) behavior.
23. WASSERMAN E. F., in Ferromagnetic Materials, Vol. 5, edited by BUSCHOW K. H. J. and WOHLFARTH F. P. (North-Holland, Amsterdam) 1990, p. 237.
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26. Such a scalar physical parameter perfectly fits the role of a single-component order parameter in a Landau-type theoretical approach which is known to deal with a single-component order parameter spanning the totally symmetrical irreducible representation of the parent phase-space group. See KUZNETSOV A. Yu. et al., Phys. Rev. B, 68 (2003) 064109.