Reentrant Spin-Glass Behavior in Cobalt(II) Based Coordination Polymers

• DOI: 10.1021/acs.cgd.9b00908
• Publication Date: 2019-10-07T17:03:28Z
• Authors: Akashdeeep Nath; S. S. Islam; Prashanta K. Mukh...; Ramesh Nath; Sukhendu Mandal
• Keywords: Atmospheric temperature range

Correlation of molecular structure and its magnetic property gives a better understanding toward the design materials with long-range order. Here we report two new cobalt-based coordination polymers that exhibited coexistence ferromagnetic (FM) order spin-glass (SG) transition at below Tc. Different orientation moments, arrangements, variation in connectivity ligands might be responsible for SG transition. The was characterized by bifurcation zero-field-cooled field-cooled splitting Tf ≈ 9.9 K (for both compounds) AC susceptibility measurements. DC magnetization revealed FM high temperature, followed low-temperature Moreover, peculiarity found χ′′(T) can attributed to complex interplay between antiferromagnetic interactions phase. Optical bandgap temperature-dependent resistivity measurements showed these compounds are semiconducting nature.