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MA: Fachverband Magnetismus

MA 44: PhD Symposium Quantum Magnets (contributed talks)

MA 44.1: Vortrag

Mittwoch, 22. März 2017, 15:00–15:15, HSZ 403

Evolution of antiferromagnetic domains in the all-in-all-out ordered pyrochlore Nd₂Zr₂O₇ — •L. Opherden^1,2, J. Hornung^1,2, T. Herrmannsdörfer¹, J. Xu^3,4, A. T. M. N. Islam³, B. Lake^3,4, and J. Wosnitza^1,2 — ¹Hochfeld-Magnetlabor Dresden (HLD-EMFL), HZDR, Dresden, Germany — ²Institut für Festkörperphysik, TU Dresden, Germany — ³Abteilung Quantenphänomene in neuen Materialien, HZB, Berlin, Germany — ⁴Institut für Festkörperphysik, TU Berlin, Germany

We report the observation of magnetic domains in an exotic, antiferromagnetically ordered all-in-all-out state of Nd₂Zr₂O₇, induced by spin canting. Two different spin arrangements fulfill this configuration of Ising-like spins. This leads to the occurrence of magnetic domains. While the two all-in-all-out spin arrangements occur equiprobable in zero field, the application of a magnetic field along the [111] direction allows for a change of their domain structure. We have investigated Nd₂Zr₂O₇ by means of static magnetization and dynamic susceptibility. The ground state occurs below 0.31 K and is stable for external magnetic fields up to 0.14 T. The magnetic domains are observed through a hysteresis of the susceptibility χ_ac(H). No hysteresis occurs in case the external magnetic field is applied along [100].