Supercritical CO2-induced room-temperature ferromagnetism in two-dimensional MoO3−x  

作　　者：Wei Liu Qun Xu 

机构地区：[1]Henan Institute of Advanced Technology,Zhengzhou University,Zhengzhou 450001,P.R.China [2]Department of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,P.R.China

出　　处：《Industrial Chemistry & Materials》2023年第1期140-145,共6页工业化学与材料（英文）

基　　金：the National Natural Science Foundation of China(No.21773216,51173170);the Henan-Provincial and the China-National Natural Science United Foundation(Project No.U2004208).

摘　　要：Two-dimensional(2D)magnetic semiconductors are crucial in spin-based information-processing technologies due to the combination of the strong 2D quantum effects,surface effects and the control of spin states.However,most experimental approaches for tuning 2D magnets achieve pure ferromagnetism at low temperature.Herein,a defect engineering strategy using supercritical CO2 is introduced to achieve nanostructure with abundant defects for 2D MoO3−x,and room-temperature ferromagnetism can be obtained and tuned by introduction of the Mo5+ion depending on the change of supercritical pressure.In defective regions,the presence of the pentacoordinated[Mo5+O5]centers can achieve ferromagnetic ordering resulting in room-temperature ferromagnetism.With increasing supercritical pressure,it is easier for the supercritical CO2 to break the Mo–O bonds,achieving enhancement of the ferromagnetic performance with desired Curie temperature(>380 K).The magnetic responses in the MoO3−x system provide a step closer to the expansion of spin electronics.

关 键 词：Supercritical CO2 Room-temperature ferromagnetism TWO-DIMENSIONAL MoO3-x. 

分 类 号：O64[理学—物理化学]