Coherent magnetic diffraction from the uranium M4 edge in the multi-k magnet, USb

DOI: 10.1088/1742-6596/519/1/012010

Authors: J. Lim (University of Birmingham) , E. Blackburn (University of Birmingham) , G. Beutier (CNRS Grenoble-INP – UJF) , F. Livet (CNRS Grenoble-INP – UJF) , N. Magnani (European Commission, Joint Research Centre, Institute for Transuranium Elements) , A. Bombardi (Diamond Light Source) , R. Caciuffo (uropean Commission, Joint Research Centre, Institute for Transuranium Elements) , G. H. Lander (uropean Commission, Joint Research Centre, Institute for Transuranium Elements)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: REXS 2013 — Workshop on Resonant Elastic X-ray Scattering in Condensed Matter
Peer Reviewed: No

State: Published (Approved)
Published: May 2014
Diamond Proposal Number(s): 8384

Abstract: The slow magnetic dynamics, from seconds to kiloseconds, of the canonical 3-k antiferromagnet USb have been probed, using X-ray photon correlation spectroscopy (XPCS). In this work, XPCS is combined with resonant X-ray diffraction to focus on scattering at an antiferromagnetic Bragg peak. High quality coherent magnetic diffraction patterns were recorded (speckle contrast of about 88%) and magnetic domains were observed; the number of domains increases on warming to T* about 160 K, where the spin waves soften to zero frequency, and again on warming to TN = 218 K. The intensity auto-correlation, g2(t), is primarily static over 1000 s, with a small dynamical process (change of about 0.4%) that increases in rate close to the transitions.

Journal Keywords: Antiferromagnetism; Antimonides; Bragg Curve; Bragg Reflection; Correlations; Photons; Probes; Spin Waves; Temperature Dependence; Uranium; Uranium Compounds; X Radiation; X-Ray Diffraction; X-Ray Spectroscopy

Diamond Keywords: Antiferromagnetism

Subject Areas: Physics, Materials


Instruments: I16-Materials and Magnetism

Added On: 21/10/2014 12:23

Documents:
Lim_2014_J._Phys.%3A_Conf._Ser._519_012010.pdf

Discipline Tags:

Quantum Materials Physics Magnetism Materials Science

Technical Tags:

Spectroscopy X-ray Photon Correlation Spectroscopy (XPCS)