Low-temperature high-frequency dynamic magnetic susceptibility of classical spin-ice Dy2Ti2O7

S. Teknowijoyo, K. Cho, E. I. Timmons, M. A. Tanatar, J. W. Krizan, R. J. Cava, R. Prozorov

Research output: Contribution to journalArticlepeer-review

Abstract

Radio-frequency (14.6 MHz) AC magnetic susceptibility, χ A C, of Dy2Ti2O7 was measured using self-oscillating tunnel-diode resonator. Measurements were made with the excitation AC field parallel to the superimposed DC magnetic field up to 5 T in a wide temperature range from 50 mK to 100 K. At 14.6 MHz, a known broad peak of χ AC (T) from kHz - range audio-frequency measurements around 15 K for both [111] and [110] directions shifts to 45 K, continuing the Arrhenius activated behavior with the same activation energy barrier of E a ≈ 230 K. Magnetic field dependence of χ AC along [111] reproduces previously reported low-temperature two-in-two-out to three-in-one-out spin configuration transition at about 1 T, and an intermediate phase between 1 and 1.5 T. The boundaries of the intermediate phase show reasonable overlap with the literature data and connect at a critical endpoint of the first order transition line, suggesting that these features are frequency independent. An unusual upturn of the magnetic susceptibility at T → 0 was observed in magnetic fields between 1.5 T and 2 T for both magnetic field directions, before fully polarized configuration sets in above 2 T.

Original languageEnglish (US)
Article number455802
JournalJournal of Physics Condensed Matter
Volume33
Issue number45
DOIs
StatePublished - Nov 2021

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Keywords

  • frequency domain
  • spin ice
  • susceptibility

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