Phonon-induced quadrupolar ordering of the magnetic superconductor TmNi2B2C

N. H. Andersen; J. Jensen; T. B. S. Jensen; M. v. Zimmermann; R. Pinholt; A. B. Abrahamsen; K. Nørgaard Toft; P. Hedegård; P. C. Canfield

doi:10.1103/PhysRevB.73.020504

Phonon-induced quadrupolar ordering of the magnetic superconductor TmNi2B2C

N. H. Andersen, J. Jensen, T. B. S. Jensen, M. v. Zimmermann, R. Pinholt, A. B. Abrahamsen, K. Nørgaard Toft, P. Hedegård, P. C. Canfield

DOI 10.1103/PhysRevB.73.020504 · Physical Review B

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Abstract

We present synchrotron x-ray diffraction studies revealing that the lattice of thulium borocarbide is distorted below TQ≃13.5K at zero field. TQ increases and the amplitude of the displacements is drastically enhanced by a factor of 10 at 60 kOe when a magnetic field is applied along [100]. The distortion occurs at the same wave vector as the antiferromagnetic ordering induced by the a-axis field. A model is presented that accounts for the properties of the quadrupolar phase and explains the peculiar behavior of the antiferromagnetic ordering previously observed in this compound.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
TmNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	11	Pressure not reported	unknown