High-temperature, structural disorder, phase transitions, and piezoelectric properties of GaPO4
Physical Review B American Physical Society (APS) 73:1 (2006) 014103
Helen Dick Megaw (1907-2002)
Chapter in OUT OF THE SHADOWS: CONTRIBUTIONS OF TWENTIETH-CENTURY WOMEN TO PHYSICS, (2006) 213-221
High-pressure structure of LaSr2Mn2O7 bilayer manganite
Journal of Physics and Chemistry of Solids 67 (2006) 2046-2050
Abstract:
The structure of bilayer manganite LaSr2Mn2O7 has been investigated under high pressure using synchrotron and laboratory X-rays in the angle-dispersive X-ray diffraction geometry up to 35 GPa at ambient temperature. The Rietveld refinement results of the powder diffraction data show a crossover between the axial and equatorial Mn–O bond length values and a significant suppression of Jahn–Teller (JT) distortion around 16 GPa. Our results imply that a re-entrant behavior in LaSr2Mn2O7, which shows equality in all the three Mn–O bond length values around 16 GPa similar to ambient conditions, may dramatically alter the orbital ordering. Further, the P-V data for the bilayer compounds indicate that the additional substitution of La3+ for Sr2+ lowers the bulk modulus and enhances lattice softening.Magnetization of La2-xSrxNiO4+δ (0≤x≤0.5):: Spin-glass and memory effects -: art. no. 014434
PHYSICAL REVIEW B 73:1 (2006) ARTN 014434
Non-linear optical properties and absolute structure of metastable 4-methyl benzophenone
ZEITSCHRIFT FUR KRISTALLOGRAPHIE 221:4 (2006) 294-299