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Direct observation of anapoles by neutron diffraction

DOI: 10.1103/PhysRevLett.122.047203 DOI Help

Authors: S. w. Lovesey (ISIS Facility; Diamond Light Source) , T. Chatterji (Institut Laue-Langevin) , A. Stunault (Institut Laue-Langevin) , D. d. Khalyavin (ISIS Facility) , G. Van Der Laan (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 122 , PAGES 047203

State: Published (Approved)
Published: February 2019

Open Access Open Access

Abstract: The scope of magnetic neutron scattering has been expanded by the observation of electronic Dirac dipoles (anapoles) that are polar (parity odd) and magnetic (time odd). A zero-magnetization ferromagnet Sm0.976Gd0.024Al2 with a diamond-type structure presents Dirac multipoles at basis-forbidden reflections that include the standard (2, 2, 2) reflection. Magnetic amplitudes measured at four such reflections are in full accord with a structure factor calculated from the appropriate magnetic space group.

Journal Keywords: dirac multipoles; SmAl2; neutron; scattering; magnetism

Diamond Keywords: Ferromagnetism

Subject Areas: Physics, Materials, Chemistry

Technical Areas: Theoretical Physics

Added On: 02/02/2019 11:15


Discipline Tags:

Materials Science Quantum Materials Physics Magnetism Theoretical Physics

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