Slow spin relaxation and low-temperature spin freezing in the disordered fluorite Ho₂Zr₂O₇

• Verfasst von: Elghandour, Ahmed [VerfasserIn]
• Verfasst von: Sheetal [VerfasserIn]
• Verfasst von: Yadav, C. S. [VerfasserIn]
• Verfasst von: Klingeler, Rüdiger [VerfasserIn]
• Titel: Slow spin relaxation and low-temperature spin freezing in the disordered fluorite Ho₂Zr₂O₇
• Verf.angabe: A. Elghandour, Sheetal, C.S. Yadav, R. Klingeler
• E-Jahr: 2024
• Jahr: 7 August 2024
• Umfang: 7 S.
• Fussnoten: Gesehen am 27.03.2025
• Titel Quelle: Enthalten in: Physical review. B, Condensed matter and materials physics
• Ort Quelle: College Park, Md. : APS, 1970
• Jahr Quelle: 2024
• Band/Heft Quelle: 110(2024), 6, Artikel-ID 064408, Seite 064408-1-064408-7
• ISSN Quelle: 1550-235X
• DOI: doi:10.1103/PhysRevB.110.064408
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1920734252

Abstract

We report on the origin of spin freezing in the disordered fluorite Ho₂Zr₂O₇. The system is investigated by low-temperature heat capacity as well as by dc and ac magnetization. While the system does not show a long-range magnetic order down to at least ????=280 mK, we observe signatures of slow spin dynamics, magnetic-field-induced relaxation processes at relatively high temperatures, and a spin-frozen state below ????=0.6 K. Our results suggest that similar to the canonical spin-ice systems Ho₂Zr₂O₇ [J. Phys.: Condens. Matter 16, S635 (2004)] and Dy2⁢Ti2⁢O7 [Nature (London) 413, 48 (2001)], spin freezing in Ho₂Zr₂O₇ is preceded by two slow spin-relaxation processes; the first forms a field-induced region extending to at least 18 K and the second is rather field independent and appears at ????g⁡2=1 K [J. Ramón, Ph.D. thesis, Universidade de São Paulo (2020)].