Distinct domain switching in Nd 0.05 Ce 0.95 CoIn 5 at low and high fields.

Autor: Mazzone DG; Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland. danimazzone@gmail.com., Yadav R; Laboratory for Scientific Developments and Novel Materials, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland., Bartkowiak M; Laboratory for Scientific Developments and Novel Materials, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland., Gavilano JL; Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland., Raymond S; Univ. Grenoble Alpes and CEA, INAC, MEM, F-38000, Grenoble, France., Ressouche E; Univ. Grenoble Alpes and CEA, INAC, MEM, F-38000, Grenoble, France., Lapertot G; Univ. Grenoble Alpes and CEA, INAC, PHELIQS, F-38000, Grenoble, France., Kenzelmann M; Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland.; Laboratory for Scientific Developments and Novel Materials, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2018 Jan 22; Vol. 8 (1), pp. 1295. Date of Electronic Publication: 2018 Jan 22.
DOI: 10.1038/s41598-018-19555-z
Abstrakt: Nd 0.05 Ce 0.95 CoIn 5 features a magnetic field-driven quantum phase transition that separates two antiferromagnetic phases with an identical magnetic structure inside the superconducting condensate. Using neutron diffraction we demonstrate that the population of the two magnetic domains in the two phases is affected differently by the rotation of the magnetic field in the tetragonal basal plane. In the low-field SDW-phase the domain population is only weakly affected while in the high-field Q-phase they undergo a sharp switch for fields around the a-axis. Our results provide evidence that the anisotropic spin susceptibility in both phases arises ultimately from spin-orbit interactions but are qualitatively different in the two phases. This provides evidence that the electronic structure is changed at the quantum phase transition, which yields a modified coupling between magnetism and superconductivity in the Q-phase.
Databáze: MEDLINE
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