TY - JOUR
T1 - Correlations of crystallographic defects and anisotropy with magnetotransport properties in FexTaS2 single crystals (0.23≤x≤0.35) CORRELATIONS of CRYSTALLOGRAPHIC DEFECTS and ... CHEN, CHIKARA, ZAPF, and MOROSAN
AU - Chen, Chih Wei
AU - Chikara, Shalinee
AU - Zapf, Vivien
AU - Morosan, E.
PY - 2016/8/2
Y1 - 2016/8/2
N2 - Very large magnetoresistance discovered in single crystals of the ferromagnetic Fe-intercalated transition-metal dichalcogenide Fe0.28TaS2 was attributed to the deviation of the Fe concentration from commensurate values (x=1/4 or 1/3), which caused magnetic moment misalignments. Here we report a study of FexTaS2 crystals with 0.23≤x≤0.35, demonstrating that crystallographic defects lead to spin disorder, which correlates with magnetotransport properties, such as switching magnetic field HS, magnetoresistance (MR), and even zero-field resistivity ρ0 and temperature coefficient A in ρ(T)=ρ0+AT2: The ordering temperature TC and Weiss temperature θW are maximized at the superstructure composition x=1/4, whereas Hs, MR, ρ0, and A are minimum. Conversely, at a composition intermediate between the superstructure compositions x=1/4 and 1/3, the corresponding magnetotransport properties reach local maxima.
AB - Very large magnetoresistance discovered in single crystals of the ferromagnetic Fe-intercalated transition-metal dichalcogenide Fe0.28TaS2 was attributed to the deviation of the Fe concentration from commensurate values (x=1/4 or 1/3), which caused magnetic moment misalignments. Here we report a study of FexTaS2 crystals with 0.23≤x≤0.35, demonstrating that crystallographic defects lead to spin disorder, which correlates with magnetotransport properties, such as switching magnetic field HS, magnetoresistance (MR), and even zero-field resistivity ρ0 and temperature coefficient A in ρ(T)=ρ0+AT2: The ordering temperature TC and Weiss temperature θW are maximized at the superstructure composition x=1/4, whereas Hs, MR, ρ0, and A are minimum. Conversely, at a composition intermediate between the superstructure compositions x=1/4 and 1/3, the corresponding magnetotransport properties reach local maxima.
UR - http://www.scopus.com/inward/record.url?scp=84982994501&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.94.054406
DO - 10.1103/PhysRevB.94.054406
M3 - Article
SN - 1098-0121
VL - 94
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 5
M1 - 054406
ER -