Abstract
Very large magnetoresistance discovered in single crystals of the ferromagnetic Fe-intercalated transition-metal dichalcogenide was attributed to the deviation of the Fe concentration from commensurate values ( or 1/3), which caused magnetic moment misalignments. Here we report a study of crystals with , demonstrating that crystallographic defects lead to spin disorder, which correlates with magnetotransport properties, such as switching magnetic field , magnetoresistance (MR), and even zero-field resistivity and temperature coefficient in : The ordering temperature and Weiss temperature are maximized at the superstructure composition , whereas , MR, , and are minimum. Conversely, at a composition intermediate between the superstructure compositions and 1/3, the corresponding magnetotransport properties reach local maxima.
- Received 26 May 2016
DOI:https://doi.org/10.1103/PhysRevB.94.054406
©2016 American Physical Society