Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Redfern, S. A. T."'
Calcium stannate perovskite (CaSnO3) has been studied by Raman spectroscopy at two excitation wavelengths (514.5 nm and 632.8 nm). A new first-order order-disorder phase transition induces Raman frequency shifts and line width doubling at 121C on hea
Externí odkaz:
http://arxiv.org/abs/1001.3973
Multiferroic BiFeO3 ceramics have been doped with Ca. The smaller ionic size of Ca compared with Bi means that doping acts as a proxy for hydrostatic pressure, at a rate of 1%Ca=0.3GPa. It is also found that the magnetic Neel temperature (TNeel) incr
Externí odkaz:
http://arxiv.org/abs/0903.2976
We report X-ray structural studies of the metal-insulator phase transition in bismuth ferrite, BiFeO3, both as a function of temperature and of pressure (931 oC at atmospheric pressure and ca. 45 GPa at ambient temperature). Based on the experimental
Externí odkaz:
http://arxiv.org/abs/0901.3748
Our measured dielectric constant and mechanical response of multiferroic BiFeO3 indicate four phase transitions below room temperature. Features correlate with those reported at 50K (from a peak in the zero-field-cooled magnetic susceptibility) and 2
Externí odkaz:
http://arxiv.org/abs/0806.3241
Autor:
Palai, R., Katiyar, R. S., Schmid, H., Tissot, P., Clark, S. J., Robertson, J., Redfern, S. A. T., Scott, J. F.
Publikováno v:
Physical Review B, 77, 014110 (2008)
We show that epitaxial (001) thin films of multiferroic bismuth ferrite BiFeO3 are monoclinic at room temperature instead of tetragonal or Rhombohedral as reported earlier . We report a orthorhombic order-disorder beta-phase between 820C and 950C con
Externí odkaz:
http://arxiv.org/abs/0705.2883
Publikováno v:
Science, 1996 Mar . 271(5256), 1713-1715.
Externí odkaz:
https://www.jstor.org/stable/2890833
Publikováno v:
Journal of Applied Physics; 2/15/2006, Vol. 99 Issue 4, p044101, 7p, 1 Color Photograph, 1 Chart, 5 Graphs
Autor:
Stone, H. J., Tucker, M. G., Meducin, F. M., Dove, M. T., Redfern, S. A. T., Le Godec, Y., Marshall, W. G.
Publikováno v:
Journal of Applied Physics; 9/15/2005, Vol. 98 Issue 6, p064905, 10p, 2 Diagrams, 1 Chart, 5 Graphs
Publikováno v:
Journal of Applied Physics; 9/1/2003, Vol. 94 Issue 5, p3333, 12p, 8 Graphs