2015/12/01 by Harish Kumar, A. K. Pramanik
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Dynamics (music) #Materials science #Non-equilibrium thermodynamics #Nuclear materials and radiation effects #Phase (matter) #Physics #Pyrochlore #Quantum mechanics #Thermodynamics #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1016/j.jmmm.2016.02.033
published as J. Magn. Magn. Mater. 409, 20 (2016)
arxiv created 2015/12/01 · openalex publication_date 2016/02/20 · arxiv updated 2017/02/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Geometrical frustration and spin-orbit coupling effect together play vital role to influence properties in pyrochlore based iridium oxides. Here we have investigated detailed structural, magnetic, thermodynamic and transport properties of pyrochlore iridate Y2Ir2O7. Magnetization data show onset of magnetic irreversibility around temperature Tirr ∼ 160 K, however, no sign of long-range type ferromagnetic ordering is observed below Tirr. Specific heat data show no visible anomaly across Tirr, and the analysis of data indicate sizable density of states across Fermi level. Temperature dependent x-ray diffraction measurements show no change in structural symmetry down to low temperature. The material, on the other hand, shows significant relaxation and aging behavior similar to glassy dynamics. The electronic charge transport in this highly insulating system is found to follow power law dependence with temperature. The material shows negative magnetoresistance which is explained with quantum interference effect.