Field driven magnetostructural transitions in GeCo$_2$O$_4$

X. Fabrèges; E. Ressouche; F. Duc; S. de Brion; M. Amara; C. Detlefs; L. Paolasini; E. Suard; L. -P. Regnault; B. Canals; P. Strobel; V. Simonet

doi:10.1103/PhysRevB.95.014428

Field driven magnetostructural transitions in GeCo$_2$O$_4$

Strongly Correlated Electrons 2017-02-01 v2

Authors: X. Fabrèges , E. Ressouche , F. Duc , S. de Brion , M. Amara , C. Detlefs , L. Paolasini , E. Suard , L. -P. Regnault , B. Canals , P. Strobel , V. Simonet

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Abstract

In the spinel compound GeCo $_2$ O $_4$ , the Co $^{2+}$ pyrochlore sublattice presents remarkable magnetic field-induced behaviors that we unveil through neutron and X-ray single-crystal diffraction. The N\'eel ordered magnetic phase is entered through a structural lowering of the cubic symmetry. In this phase, when a magnetic field is applied along a 2-fold cubic direction, a spin-flop transition of one fourth of the magnetic moments releases the magnetic frustration and triggers magnetostructural effects. At high field, these ultimately lead to an unusual spin reorientation associated to structural changes.

Keywords

frustrated magnetism magnetic phase transitions phase transitions

Cite

@article{arxiv.1609.08805,
  title  = {Field driven magnetostructural transitions in GeCo$_2$O$_4$},
  author = {X. Fabrèges and E. Ressouche and F. Duc and S. de Brion and M. Amara and C. Detlefs and L. Paolasini and E. Suard and L. -P. Regnault and B. Canals and P. Strobel and V. Simonet},
  journal= {arXiv preprint arXiv:1609.08805},
  year   = {2017}
}

Field driven magnetostructural transitions in GeCo$_2$O$_4$

Abstract

Keywords

Cite

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