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E. Jericha, G. Badurek, Ch. Gösselsberger, R. Grössinger, D. Süss:
"Ultra-small-angle polarised neutron scattering experiments on novel magnetic materials";
Poster: Joint annual meeting of the Swiss and Austrian Federal Physical Society, Lausanne, CH; 15.06.2011 - 17.06.2011.

Ultra-small-angle scattering of polarised neutrons (USANSPOL) allows for the study of magnetic structure in the micrometre range [1]. The technique takes advantage from the narrow angular width of the Bragg reflection curve of perfect crystals and is employed in a double-crystal configuration of channel-cut perfect silicon crystals. Polarisation of the neutron beam is obtained by placing magnetic prisms, which act as birefringent regions, between the monochromator and analyser crystal [2]. Samples are placed between the polariser prisms and the analyser crystal. Scattering of spin-up and spin-down neutrons is recorded in a single measurement and identified by an angular shift of their respective scattering curves [3]. We have developed a prototype sample environment and handling system by which anisotropic samples may be aligned in different orientations and be subjected to external magnetic fields and stresses. Here, we present experimental results on magnetic ribbons of varying composition with remarkable magnetostriction properties, highly promising for technological application, and methodic development. The potential of the USANSPOL technique is highlighted.
[1] G. Badurek, E. Jericha, R. Grössinger, R. Sato-Turtelli, J. Phys.: Conf. Ser. 211 (2010) 012027.
[2] E. Jericha, G. Badurek, M. Trinker, Physica B 397 (2007) 88.
[3] E. Jericha, G. Badurek, R. Grössinger, doi:10.1016/j.physb.2010.11.036.