2001/08/08 by H. Fukazawa, Hideto Fukazawa, R. G. Melko +6 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Condensed matter physics #Crystal Structures and Properties #Magnetic anisotropy #Magnetic field #Magnetization #Materials science #Multiferroics and related materials #Optics #Physics #Quantum mechanics #Spin (aerodynamics) #Spin ice #Thermodynamics #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.65.054410
published as Phys. Rev. B 65, 054410 (2002). · 7 pages, 6 figures, submitted to Phys. Rev. B
arxiv created 2001/08/08 · openalex publication_date 2002/01/01 · arxiv updated 2016/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report magnetization and ac susceptibility of single crystals of the spin-ice compound Dy2Ti2O7. Saturated moments at 1.8 K along the characteristic axes [100] and [110] agree with the expected values for an effective ferromagnetic nearest-neighbor Ising pyrochlore with local 〈111〉 anisotropy, where each magnetic moment is constrained to obey the ``ice rule.'' At high enough magnetic fields along the [111] axis, the saturated moment exhibits a breaking of the ice rule; it agrees with the value expected for a three-in, one-out spin configuration. Assuming the realistic magnetic interaction between Dy ions given by the dipolar spin ice model, we completely reproduce the results at 2 K by Monte Carlo calculations. However, down to at least 60 mK, we have not found any experimental evidence of the long-range magnetic ordering predicted by this model to occur at around 180 mK. Instead, we confirm the spin freezing of the system below 0.5 K.