Zobrazeno 1 - 10
of 201
pro vyhledávání: '"Parker, D. R."'
Autor:
Taylor, A. E., Ewings, R. A., Perring, T. G., Parker, D. R., Ollivier, J., Clarke, S. J., Boothroyd, A. T.
Publikováno v:
J. Phys.: Condens. Matter 25 425701 (2013)
We report neutron inelastic scattering measurements on polycrystalline LaFePO and Sr2ScO3FeP, two members of the iron phosphide families of superconductors. No evidence is found for any magnetic fluctuations in the spectrum of either material in the
Externí odkaz:
http://arxiv.org/abs/1302.5057
Autor:
Wright, J. D., Lancaster, T., Franke, I., Steele, A. J., Möller, J. S., Pitcher, M. J., Corkett, A. J., Parker, D. R., Free, D. G., Pratt, F. L., Baker, P. J., Clarke, S. J., Blundell, S. J.
The interplay and coexistence of superconducting, magnetic and structural order parameters in NaFe{1-x}Co{x}As has been studied using SQUID magnetometry, muon-spin rotation and synchrotron x-ray powder diffraction. Substituting Fe by Co weakens the o
Externí odkaz:
http://arxiv.org/abs/1112.0419
Autor:
Baker, P. J., Giblin, S. R., Pratt, F. L., Liu, R. H., Wu, G., Chen, X. H., Pitcher, M. J., Parker, D. R., Clarke, S. J., Blundell, S. J.
We report heat capacity measurements of the pnictide materials SmFeAsO$_{1-x}$F$_x$, NdFeAsO, LaFeAsO$_{1-x}$F$_x$ and LiFeAs. For SmFeAsO$_{1-x}$F$_x$, with x close to 0.1, we use 3 He measurements to demonstrate a transfer of entropy from the peak
Externí odkaz:
http://arxiv.org/abs/0811.2494
Autor:
Pratt, F. L., Baker, P. J., Blundell, S. J., Lancaster, T., Lewtas, H. J., Adamson, P., Pitcher, M. J., Parker, D. R., Clarke, S. J.
Publikováno v:
Phys. Rev. B 79, 052508 (2009)
Transverse-field muon-spin rotation measurements performed on two samples of LiFeAs demonstrate that the superfluid stiffness of the superconducting condensate in relation to its superconducting transition temperature is enhanced compared to other pn
Externí odkaz:
http://arxiv.org/abs/0810.0973
Autor:
Baker, P. J., Lewtas, H. J., Blundell, S. J., Lancaster, T., Pratt, F. L., Parker, D. R., Pitcher, M. J., Clarke, S. J.
We report muon-spin relaxation measurements of highly homogeneous samples of FeAs and FeAs2, both previously found as impurity phases in some samples of recently synthesized pnictide superconductors. We observe well defined muon precession in the FeA
Externí odkaz:
http://arxiv.org/abs/0809.2522
Autor:
Ewings, R. A., Perring, T. G., Bewley, R. I., Guidi, T., Pitcher, M. J., Parker, D. R., Clarke, S. J., Boothroyd, A. T.
Publikováno v:
Phys. Rev. B 78, 220501(R) (2008)
We report neutron scattering measurements of cooperative spin excitations in antiferromagnetically ordered BaFe2As2, the parent phase of an iron pnictide superconductor. The data extend up to ~100meV and show that the spin excitation spectrum is shar
Externí odkaz:
http://arxiv.org/abs/0808.2836
Probing the Effects of Light and Temperature on Diurnal Rhythms of Phytosiderophore Release in Wheat
Autor:
Parker, D. R.
Publikováno v:
The New Phytologist, 2007 Jan 01. 174(1), 101-108.
Externí odkaz:
https://www.jstor.org/stable/4640955
Autor:
Graham, R. C., Parker, D. R.
Publikováno v:
Oecologia, 2003 Jan 01. 134(1), 46-54.
Externí odkaz:
https://www.jstor.org/stable/4223473
Publikováno v:
Plant and Soil, 2006 Jan 01. 289(1/2), 171-185.
Externí odkaz:
https://www.jstor.org/stable/24125504
Publikováno v:
Plant and Soil, 2002 Apr 01. 241(1), 57-65.
Externí odkaz:
https://www.jstor.org/stable/24122542