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Title: Correlations of crystallographic defects and anisotropy with magnetotransport properties in Fe x TaS 2 single crystals ( 0.23 x 0.35 )

Abstract

Very large magnetoresistance discovered in single crystals of the ferromagnetic Fe-intercalated transition metal dichalcogenide, Fe 0.28TaS 2 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 Fe xTaS 2 crystals with 0:23 ≤ x ≤ 0:35, demonstrating that crystallographic defects lead to spin disorder, which correlates with magneto-transport properties such as switching magnetic fi eld HS, magnetoresistance MR, and even zero-field resistivity ρ0 and temperature coefficient A in ρ(T) = ρ 0 + AT 2: The ordering temperature T C and Weiss temperature θ W are maximized at the superstructure composition x = 1/4, while H s, MR, ρ 0, and A are minimum. Conversely, at a composition intermediate between the superstructure compositions x = 1/4 and 1/3, the corresponding magneto-transport properties reach local maxima.

Authors:
 [1];  [2];  [2];  [1]
  1. Rice Univ., Houston, TX (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE
OSTI Identifier:
1414097
Alternate Identifier(s):
OSTI ID: 1280211
Report Number(s):
LA-UR-16-27437
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1800631
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 5; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; High Magnetic Field Science

Citation Formats

Chen, Chih-Wei, Chikara, Shalinee, Zapf, Vivien S., and Morosan, E. Correlations of crystallographic defects and anisotropy with magnetotransport properties in FexTaS2 single crystals ( 0.23≤x≤0.35 ). United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.054406.
Chen, Chih-Wei, Chikara, Shalinee, Zapf, Vivien S., & Morosan, E. Correlations of crystallographic defects and anisotropy with magnetotransport properties in FexTaS2 single crystals ( 0.23≤x≤0.35 ). United States. doi:10.1103/PhysRevB.94.054406.
Chen, Chih-Wei, Chikara, Shalinee, Zapf, Vivien S., and Morosan, E. Tue . "Correlations of crystallographic defects and anisotropy with magnetotransport properties in FexTaS2 single crystals ( 0.23≤x≤0.35 )". United States. doi:10.1103/PhysRevB.94.054406. https://www.osti.gov/servlets/purl/1414097.
@article{osti_1414097,
title = {Correlations of crystallographic defects and anisotropy with magnetotransport properties in FexTaS2 single crystals ( 0.23≤x≤0.35 )},
author = {Chen, Chih-Wei and Chikara, Shalinee and Zapf, Vivien S. and Morosan, E.},
abstractNote = {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 magneto-transport properties such as switching magnetic fi eld 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, while Hs, MR, ρ0, and A are minimum. Conversely, at a composition intermediate between the superstructure compositions x = 1/4 and 1/3, the corresponding magneto-transport properties reach local maxima.},
doi = {10.1103/PhysRevB.94.054406},
journal = {Physical Review B},
number = 5,
volume = 94,
place = {United States},
year = {2016},
month = {8}
}

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