Correlations of crystallographic defects and anisotropy with magnetotransport properties in FexTaS2 single crystals ( 0.23≤x≤0.35 )

Chen, Chih-Wei; Chikara, Shalinee; Zapf, Vivien S.; Morosan, E.

doi:10.1103/PhysRevB.94.054406

Title: Correlations of crystallographic defects and anisotropy with magnetotransport properties in ${Fe}_{x} {TaS}_{2}$ single crystals ( $0.23 \leq x \leq 0.35$ )

Abstract

Very large magnetoresistance discovered in single crystals of the ferromagnetic Fe-intercalated transition metal dichalcogenide, Fe_0.28TaS₂ 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 Fe_xTaS₂ 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 T_C and Weiss temperature θ_W are maximized at the superstructure composition x = 1/4, while H_s, 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.

Authors:

Chen, Chih-Wei ^[1]; Chikara, Shalinee ^[2]; Zapf, Vivien S. ^[2]; Morosan, E. ^[1]

Rice Univ., Houston, TX (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: Tue Aug 02 00:00:00 EDT 2016

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.

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                    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.  https://doi.org/10.1103/PhysRevB.94.054406

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                    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.  https://doi.org/10.1103/PhysRevB.94.054406.  https://www.osti.gov/servlets/purl/1414097.

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@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         = {Tue Aug 02 00:00:00 EDT 2016},

  month        = {Tue Aug 02 00:00:00 EDT 2016}

}

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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

Citation Formats

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Title: Correlations of crystallographic defects and anisotropy with magnetotransport properties in ${Fe}_{x} {TaS}_{2}$ single crystals ( $0.23 \leq x \leq 0.35$ )

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