Zobrazeno 1 - 10
of 132
pro vyhledávání: '"Doon Gibbs"'
Autor:
Doon Gibbs, Gerry Lander
Publikováno v:
Neutron News. 33:13-13
Autor:
J.A. Simpson, D. F. McMorrow, Doon Gibbs, D. A. Jehan, R A Cowley, T. R. Thurston, M. R. Wells, R.C.C. Ward
The effect of competing crystal-field anisotropies on magnetic order has been investigated in a series of Ho/Er superlattices using neutron and resonant X-ray magnetic diffraction techniques. The neutron diffraction reveals that for temperatures in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77a530c736868fc3ebcefd3de2e3d4be
https://ora.ox.ac.uk/objects/uuid:9829ae5a-9683-4065-8aba-34e9f510db71
https://ora.ox.ac.uk/objects/uuid:9829ae5a-9683-4065-8aba-34e9f510db71
Autor:
Y. Tomioka, Young-June Kim, Y. Tokura, John Hill, Diego Casa, Valery Kiryukhin, Thomas Gog, K. J. Thomas, S. Grenier, Doon Gibbs, C. Venkataraman
Publikováno v:
Physica B: Condensed Matter. 345:6-10
X-ray resonant techniques have been used to study the ground state and electronic excitations of the perovskite Pr0.6Ca0.4MnO3. We utilized resonant diffraction at the Mn K-edge as a contrast technique for determining the pattern of Mn atoms in inequ
Publikováno v:
Surface Science. 498:74-82
The surface structure of Ru(0 0 0 1) has been studied between 300 and 1870 K using X-ray diffraction. At 300 K, the outermost layer is contracted by 2.2(4)%, in agreement with the value determined by low-energy electron diffraction studies, but about
Autor:
Nikitas I. Gidopoulos, G. M. Watson, Doon Gibbs, Sean Langridge, Martin Long, C. Vettier, Joseph J. Betouras, Frank Pollmann, G. H. Lander
Publikováno v:
Physical review letters, 2014, Vol.112(16), pp.167201 [Peer Reviewed Journal]
In the majority of magnetic systems the surface is required to order at the same temperature as the bulk. In the present study, we report a distinct and unexpected surface magnetic phase transition, uniquely at a lower temperature than the N\'eel tem
Autor:
T. Gog, Yasuhiro Tokura, John Hill, M. v. Zimmermann, Diego Casa, C. T. Venkataraman, Doon Gibbs, Sang-Wook Cheong, Bernhard Keimer, Yasuhide Tomioka, Youichi Murakami, Valery Kiryukhin, Young-June Kim, C. S. Nelson, T.Y. Koo
Publikováno v:
Applied Physics A: Materials Science & Processing. 73:723-730
We review our recent x-ray scattering studies of charge and orbital order in doped manganites, with specific emphasis on the role of orbital correlations in Pr_1-xCa_xMnO_3. For x=0.25, we find an orbital structure indistinguishable from the undoped
Autor:
Doon Gibbs
Publikováno v:
Synchrotron Radiation News. 14:4-10
Autor:
Christie Nelson, Thomas Gog, M. v. Zimmermann, John Hill, C.-C. Kao, D. Casa, Doon Gibbs, C. Venkataraman, Bernhard Keimer, Y. Tomioka, M. Blume, Yoichi Murakami, Y. Tokura
Publikováno v:
Journal of Magnetism and Magnetic Materials. 233:31-37
We present the results of X-ray scattering studies of the charge and orbital ordering in the manganite series Pr 1− x Ca x MnO 3 with x =0.25, 0.4 and 0.5. The polarization and azimuthal dependence of the charge and orbital ordering in these compou
Autor:
Naohisa Takesue, Joseph C. Woicik, Hironori Nakao, K. Ohwada, Youichi Murakami, Yuki Fujii, M. Isobe, John Hill, M. v. Zimmermann, Y. Ueda, I. Koyama, Doon Gibbs
Publikováno v:
Physical Review Letters. 85:4349-4352
Charge ordering of V4+ and V5+ in NaV2O5 has been studied by an x-ray diffraction technique using anomalous scattering near a vanadium K-absorption edge to critically enhance a contrast between the two ions. A dramatic energy dependence of the superl
Publikováno v:
Physical Review B. 62:10436-10444
The structure of strained Cu films deposited on Ru(0001) surfaces at 720 K was investigated by x-ray diffraction techniques. Our analysis shows that a single Cu monolayer adopts a pseudomorphic structure with the first three interlayer spacings signi