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Acentric magnetic and optical properties of chalcopyrite (CuFeS2)

DOI: 10.1088/0953-8984/24/21/216001 DOI Help

Authors: S. W. Lovesey (Diamond Light Source) , K. S. Knight (ISIS Facility, STFC) , C. Detlefs (European Synchrotron Radiation Facility) , S. W. Huang (Paul Scherrer Institute) , V. Scagnoli (Paul Scherrer Institute) , U. Staub (Paul Scherrer Institute)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Physics-condensed Matter , VOL 24 (21)

State: Published (Approved)
Published: May 2012

Abstract: The absence of spatial inversion symmetry at both local (point group (4) over bar) and global (crystal class (4) over bar 2m) levels greatly influences the electronic properties of chalcopyrite (CuFeS2). The predicted dichroic signals (natural circular, non-reciprocal and magneto-chiral) and resonant, parity-odd Bragg diffraction patterns at space-group forbidden reflections portray the uncommon, acentric symmetry. Despite extensive experimental investigations over several decades, by mineralogists, chemists and physicists, there is no consensus view about the electrical and magnetic properties of chalcopyrite. New spectroscopic and diffraction data, gathered at various temperatures in the vicinity of the copper and iron L-2,L-3 edges, provide necessary confidence in the magnetic motif used in our analytic simulations of x-ray scattering. With the sample held at 10 and 65 K, our data establish beyond reasonable doubt that there is no valence transition, and ordering of the copper moments as the origin of the low-temperature phase (T-c approximate to 53 K) is ruled out.

Journal Keywords: Chalcopyrite; Electrical And Magnetic Properties; X-Ray Scattering; Spectroscopy

Subject Areas: Chemistry

Facility: SLS

Added On: 08/10/2012 14:25

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