Structural phase diagram of Perovskite A 0.7 A′ 0.3 MnO 3 (A = La, Pr; A′ = Ca, Sr, Ba): A new Imma allotype
Journal of Solid State Chemistry 122:2 (1996) 444-447
Abstract:
The structural phase diagram of A 1-x A′ x MnO 3 (A = La, Pr, Y, ...; A′ = Ca, Sr, Ba, ...) as a function of the average A-site ionic radius 〈r A 〉 was determined from neutron powder diffraction data. In addition to the well-known Pnma and R3̄c phases, a new orthorhombic phase, with space group Imma, was found for large 〈r A 〉 at low temperatures. Refined structural parameters are reported for La 0.7 Ba 0.3 MnO 3 at 1.6 K (Imma) and at 293 K (R3̄c). The Imma → R3̄c phase transition was studied as a function of temperature for the same La 0.7 Ba 0.3 MnO 3 sample, and determined to be first order. © 1996 Academic Press, Inc.Lattice effects on the magnetoresistance in doped manganese perovskites
JOURNAL OF APPLIED PHYSICS 79:8 (1996) 4541-4541
Magnetic order in La1-delta MnO3
CZECHOSLOVAK JOURNAL OF PHYSICS 46 (1996) 2123-2124
Raman spectroscopic and neutron diffraction studies on natural and synthetic clathrates of air and nitrogen
NGH '96 - 2ND INTERNATIONAL CONFERENCE ON NATURAL GAS HYDRATES, PROCEEDINGS (1996) 9-16
Simultaneous structural, magnetic, and electronic transitions in La1-xCaxMnO3 with x=0.25 and 0.50.
Phys Rev Lett 75:24 (1995) 4488-4491