Low temperature Spin freezing and Diffuse Magnetic Correlations in Tb$_{2}$Zr$_{2-x}$Ti$_{x}$O$_{7}$ (x = 0, 0.5)

Sujata Singh; Leon Carstens; M. Duc Le; R. Klingeler; C. S. Yadav

paper

Low temperature Spin freezing and Diffuse Magnetic Correlations in Tb $_{2}$ Zr $_{2 - x}$ Ti $_{x}$ O $_{7}$ (x = 0, 0.5)

arXiv:2604.13864

Abstract

Structural disorder in the magnetically frustrated pyrochlore system leads to intriguing magnetic states. We present the thermodynamic behavior and short range magnetic correlations in Tb $_{2}$ Zr $_{2}$ O $_{7}$ and Tb $_{2}$ Zr $_{1.5}$ Ti $_{0.5}$ O $_{7}$ compounds. The parent compound Tb $_{2}$ Zr $_{2}$ O $_{7}$ has defect fluorite structure, which evolves toward the pyrochlore phase on Ti doping at Zr site. There is no long range magnetic order down to 0.4 K, and a magnetic field dependent spin freezing evolves below 1.25 K and 1.05 K for the parent and doped compounds, respectively. The ac susceptibility measurements indicate slow spin relaxation process below 20 K in these compounds. Inelastic neutron scattering reveals broad diffuse scattering, indicative of short range correlations at low temperature, owing to local structural distortions and persistent spin fluctuations. These results suggest a correlated, disorder influenced magnetic state in Tb $_{2}$ Zr $_{2}$ O $_{7}$ , Tb $_{2}$ Zr $_{1.5}$ Ti $_{0.5}$ O $_{7}$ compounds.

17 pages, 7 figures

Low temperature Spin freezing and Diffuse Magnetic Correlations in Tb2​Zr2−x​Tix​O7​ (x = 0, 0.5)

Abstract

Low temperature Spin freezing and Diffuse Magnetic Correlations in Tb $_{2}$ Zr $_{2 - x}$ Ti $_{x}$ O $_{7}$ (x = 0, 0.5)