Effect of magnetic dilution over electric polarization and short range magnetic ordering in Co5-xZnxTeO8
We would like to investigate the influence of a magnetic dilution over Co5-xZnxTeO8 ordered spinel family with x = 0, 1. Co5TeO8 has two structural forms: classical Fd-3m spinel and ordered P4332. While the "disordered" polymorph is a ferrimagnet, the "ordered" one is exhibiting a complex behavior with two magnetic phase transitions: incommensurate conical at 45 K allowing magnetic polarization followed by the emergence of an additional ferrimagnetic component at 27 K. For Co5-xZnxTeO8 within 0 < x < 1 magnetic dilution takes place exclusively at tetrahedral sites and fox x = 1 no long range ordering is observed up to 1.8 K. Neutron powder diffraction revealed strong magnetic diffuse scattering below 200 K and 100 K for Co5TeO8 and Co4Zn1TeO8 respectively. Previously D7 experiment on Co5TeO8 has revealed a conical nature of short-range ordering with no significant change in the behavior of spin-spin correlation function within temperature region between 90 K and 50 K. The aim of the current proposal is to finalize measurements on Co5TeO8, to characterize short-range ordering of Co4Zn1TeO8 and more generally, to reveal mechanisms of polarization within Co5-xZnxTeO8 family.
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PODCHEZERTSEV Stanislav; BARRIER Nicolas; MANGIN-THRO Lucile; RODRIGUEZ-CARVAJAL Juan and SUARD Emmanuelle. (2019). Effect of magnetic dilution over electric polarization and short range magnetic ordering in Co5-xZnxTeO8. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-32-878
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