Studies of KCrTe(2) and Its Conversion to Easy-Peel 1T-CrTe(2).

Two-dimensional ferromagnets are highly attractive for spintronic applications and chromium-telluride compounds form one of the most diverse families in this field. While the layered 1T-CrTe has been studied extensively for its high Curie temperature, strong anisotropy, and large magnetic moments, its parent compound KCrTe has received almost no systematic attention. Large crystals of KCrTe were grown by solid-state methods. Large 1T-CrTe crystals were obtained via deintercalation of K from KCrTe. KCrTe exhibited an antiferromagnetic transition around 87 K, which resides between LiCrTe and NaCrTe. The chemical process from KCrTe to 1T-CrTe was studied by static studies. The complete removal of K within KCrTe helps make 1T-CrTe easy fabrication of large thin flakes (the easy-peel 1T-CrTe), which were studied using ferromagnetic resonance spectroscopy (FMR). FMR was employed to study the magnetization dynamics of 1T-CrTe crystals, which verified that 1T-CrTe crystals exhibited ferromagnetic response at room temperature.