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MA: Fachverband Magnetismus

MA 31: Frustrated Magnets II (joint session MA/TT)

MA 31.5: Vortrag

Mittwoch, 11. März 2026, 10:30–10:45, POT/0361

Low-temperature spin-freezing in frustrated zirconates Tb₂Zr_2−xTi_xO₇ — •Frederik Leon Carstens¹, Sujata Singh², C. S. Yadav², and Rüdiger Klingeler¹ — ¹Kirchhoff Institute for Physics, Heidelberg University, Germany — ²School of Physical Sciences, IIT Mandi, India

We report on magnetic studies of polycrystalline Tb₂Zr_1−xTi_xO₇ (x=0,0.5). The zironates possess significant cationic disorder due to similar radii of the cations which introduces magnetic frustration. The materials are investigated by means of low-temperature ac and dc magnetization measurements in magnetic fields up to 7 T and down to 400 mK. Long-range magnetic order is not found down to T=400 mK. However, in small magnetic fields, we observe a low-temperature spin-frozen state below T=1.4 K and a slow spin relaxation regime which is significantly enhanced in static magnetic fields, e.g. to 15 K at B=2 T. A similar behavior has been previously reported for the related rare-earth zirconate Ho₂Zr₂O₇ and in the hafnate Tb₂Hf₂O₇ [1,2].

[1] A. Elghandour et al., Phys. Rev. B 110, 064408 (2024)

[2] V. K. Anand et al., Phys. Rev. B 97, 094402 (2018)

Keywords: Pyrochlore; Spin glass; ac magnetic susceptibility; Disordered systems