大型放射光施設 SPring-8

Speaker : Claude Lecomte

Language : ENGLISH

Affiliation : CRM², CNRS-Université de Lorraine

Title : Spin resolved mapping of Magnetic Materials: a joint approach from Xray and polarized neutron diffraction

Abstract:
Accurate high resolution x-ray [1] and polarized neutron single diffraction data allow a fine modeling of the valence electron density and spin density respectively.

In the first part of the talk we shall describe our first results on the x-ray, neutron, and polarized neutron joint refinement applied to two paramagnetic crystals: a MnCu complex [2,3] and an azido copper dimer [4,5] for which the x-ray and polarized neutron diffraction data have been respectively collected at 10K in CRM² Nancy and LLB Saclay. In the latter case we will comment the first spin resolved electron density maps and further applications to inorganic magnetic materials.

The second part of the talk will be devoted to the application of an XPAD pixel detector for time-resolved single crystal diffraction both on lab and synchrotron sources [6].

(Collaborators)
Mohamed Souhassou, Nicolas Claiser, CRM², Université de Lorraine et CNRS
Béatrice Gillon, Maxime Deutsch, LLB (CEA-CNRS)
Jean Michel Gillet, SPMS, Ecole Centrale Paris

(Reference)
1) N. K. Hansen & P. Coppens, Acta Cryst., 1978, A34, 909
2) M. Deutsch, M. Souhassou, N. Claiser, B. Gillon, J.M. Gillet, S. Pillet , C. Lecomte, (2012) Acta Cryst A 68, 675-686
3) S.Pillet, M. Souhassou, C.Lecomte, C. Mathonière, J. Am. Chem. Soc. (2004) 126(4), 1219-1228; V. Baron, B. Gillon, O. Plantevin, A. Cousson, C. Mathonière, O. Kahn, A. Grand, L. Öhrström, B. Delley, J. Am. Chem. Soc. 118 (1996) 11822-11830
4) C. Aronica, E. Jeanneau, H. El Moll, D. Luneau, B. Gillon, A. Goujon, A. Cousson, M. Angels Carvajal, V. Robert ; Chem. Eur. J., (2007), 13, 3666
5) M. Deutsch,M. Souhassou, N. Claiser, B. Gillon, J.M. Gillet ,C. Lecomte, IUCrJ , May 2014
6) Fertey P , Wenger E ,Alle P and Lecomte C
J. Appl. Cryst. (2013), 46, 1151-1161

※This seminar is held in associate with IYCr2014.
http://www.iycr2014.jp/index_e.html

Organizer : Akihiko Fujiwara
Mail : fujiwara@spring8.or.jp
PHS : 3499

Kunihisa Sugimoto
e-mail : ksugimoto@spring8.or.jp
PHS : 3428