Ferromagnetism in metallic intercalated compounds FexTaS2 (0.20⩽x⩽0.34)

Eibschütz, M.; Mahajan, Shivam; DiSalvo, F. J.; Hull, G. W.; Waszczak, J. V.

doi:10.1063/1.329629

Cited by 51 publications

(69 citation statements)

References 11 publications

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“…As found before for ferromagnetic bcc-Fe [32], this finding clearly shows that ρ fluct xx (T ) and ρ vib xx (T ) are not additive; i.e., the Matthiesen rule is violated. Comparing the calculated ρ xx (T ) curve with the available experimental data [9,20] one can see that the experimental and theoretical residual resistivities agree rather well. The fact that the theoretical values are somewhat higher may indicate that the assumption of fully random disorder on the Fe sublattice for the calculations is not fully justified; i.e., there might be some order present in the experimentally investigated samples.…”

Section: Electrical Resistivitymentioning

confidence: 71%

“…However, they allow the intercalation of magnetic atoms or molecules between the X-M-X trilayers. This leads to an interesting class of magnetic materials having quasi-2D properties [7][8][9][10] which can be varied via the amount and type of intercalated atoms. This is demonstrated in the present theoretical work on Fe-intercalated 2H-TaS 2 , where the Fe atoms occupy the octahedral holes between prismatic MX 2 trilayers (see Fig.…”

Section: Introductionmentioning

confidence: 99%

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Electronic, magnetic, and transport properties of Fe-intercalated2H−TaS2studied by means of the KKR-CPA method

Mankovsky¹,

Chadova²,

Ködderitzsch³

et al. 2015

Phys. Rev. B

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The electronic, magnetic, and transport properties of Fe-intercalated 2H-TaS 2 have been investigated by means of the Korringa-Kohn-Rostoker (KKR) method. The nonstoichiometry and disorder in the system have been accounted for using the coherent potential approximation (CPA) alloy theory. A pronounced influence of disorder on the spin magnetic moment has been found for the ferromagnetically ordered material. The same applies for the spin-orbit-induced orbital magnetic moment and magnetocrystalline anisotropy energy. The temperature dependence of the resistivity of disordered 2H-Fe 0.28 TaS 2 investigated on the basis of the Kubo-Středa formalism in combination with the alloy analogy model has been found in very satisfying agreement with experimental data. This also holds for the temperature-dependent anomalous Hall resistivity ρ xy (T ). The role of thermally induced lattice vibrations and spin fluctuations for the transport properties is discussed in detail.

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Section: Electrical Resistivitymentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Electronic, magnetic, and transport properties of Fe-intercalated2H−TaS2studied by means of the KKR-CPA method

Mankovsky¹,

Chadova²,

Ködderitzsch³

et al. 2015

Phys. Rev. B

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“…This explains the different H s values reported for the same Fe concentrations. 23,25 The fact that, in the current study, H s and other magnetotransport properties (ρ 0 , A, ∆M/M s , and MR) are correlated, suggests that the single crystals have homogeneous compositions, and therefore little or no phase boundaries.…”

Section: Discussionmentioning

confidence: 96%

Correlations of crystallographic defects and anisotropy with magnetotransport properties inFexTaS2single crystals (0.23≤x≤0.35)

et al. 2016

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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 field HS, magnetoresistance MR, and even zero-field resistivity ρ0 and temperature coefficient A in ρ(T ) = ρ0 + AT 2 : 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.

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“…Thin plate-like single crystals of Fe x TaS 2 were grown by a chemical vapor transport method 19,20,28 . Magnetic hysteresis curves of the crystals were obtained using a Quantum Design…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Color Theorems, Chiral Domain Topology, and Magnetic Properties of Fe_xTaS₂

et al. 2014

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, superconductivity [6][7][8][9] , and discommensurations [10][11][12][13][14][15] . Intercalation of other transition metal ions between the MC 2 layers gives rise to distinct superstructures, leading to significant changes in crystallographic structures and physical properties. Fe-intercalated TaS 2 shows highly anisotropic ferromagnetism at low temperatures [16][17][18][19][20] . . Magnetic hysteresis curves of the crystals were obtained using a Quantum DesignMagnetic Property Measurement System, and the real Fe compositions were estimated from the saturation magnetic moments in the magnetic hysteresis curves with the assumption that each Supplementary Information, section S1). The distinct feature between the 2a×2a and √3a×√3a superstructures in Fe x TaS 2 is the different stacking sequence of the 2D supercells along the c-axis. Specifically, the 2a×2a superstructure consists of identically stacked 2D supercells (i.e., AA-type stacking), while the √3a×√3a superstructure contains shifted 2D supercells with AB-type stacking, as shown in Fig. 1b and Fig. 1f, -5 -respectively. These different stacking sequences result in the centrosymmetric P6 3 /mmc and noncentrosymmetric and chiral P6 3 22 space groups for the 2a×2a and √3a×√3a superstructures, respectively.We found complicated configurations of antiphase domains in the dark-field images of There is an extinction rule for the dark-field images of antiphase boundaries in the 2a×2a superstructure. For example, the antiphase boundary between the BB-type and CC-type antiphase domains appears in the S1=( /2 00) (Fig 2a) and S2=(0 1/2 0) (Fig. 2b) dark-field images, but disappears in the S3=(1/2 /2 0) dark-field image of Fig. 2c (see also Supplementary Information, section S3). Each antiphase boundary becomes invisible in a dark-field image taken using one out of three superlattice spots (namely, S1, S2, or S3), when no antiphase shift at the boundary exists along a certain superlattice modulation wave vector. This absence of antiphase shifts at the antiphase boundary leads to the extinction rule for the antiphase boundaries in superlattice dark-field images. This rule is summarized in Fig. 3, showing the local structures near boundaries between two antiphase domains. The boundaries are highlighted with yellow bands, and the three directions of the superlattice modulation wave vectors are denoted by S1, S2, and S3, respectively, as shown in Fig. 1a. The red, yellow, blue, and green circles correspond to -6 -AA-, BB-, CC-, and DD-type superstructures, respectively, which are associated with four possible origins of the 2a×2a Fe superstructure. It is evident that the superlattice modulation along only one out of three equivalent crystallographic directions does not show any antiphase shift; this is indicated by light green dashed lines (along the S1 direction), light blue dashed lines (along the S2 direction), and pink dashed lines (along the S3 direction). For example, the antiphase boundary between BB-type and CC-type (or AA-type and DD-type) antiphase domains ha...

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Ferromagnetism in metallic intercalated compounds FexTaS2 (0.20⩽x⩽0.34)

Cited by 51 publications

References 11 publications

Electronic, magnetic, and transport properties of Fe-intercalated2H−TaS2studied by means of the KKR-CPA method

Electronic, magnetic, and transport properties of Fe-intercalated2H−TaS2studied by means of the KKR-CPA method

Correlations of crystallographic defects and anisotropy with magnetotransport properties inFexTaS2single crystals (0.23≤x≤0.35)

Color Theorems, Chiral Domain Topology, and Magnetic Properties of Fe_xTaS₂

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Ferromagnetism in metallic intercalated compounds FexTaS2 (0.20⩽x⩽0.34)

Cited by 51 publications

References 11 publications

Electronic, magnetic, and transport properties of Fe-intercalated2H−TaS2studied by means of the KKR-CPA method

Electronic, magnetic, and transport properties of Fe-intercalated2H−TaS2studied by means of the KKR-CPA method

Correlations of crystallographic defects and anisotropy with magnetotransport properties inFexTaS2single crystals (0.23≤x≤0.35)

Color Theorems, Chiral Domain Topology, and Magnetic Properties of FexTaS2

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Color Theorems, Chiral Domain Topology, and Magnetic Properties of Fe_xTaS₂