The distribution of Cu(II) and the magnetic properties of the synthetic analogue of tetrahedrite: Cu12Sb4S13

Benedetto, Francesco Di; Bernardini, G. P.; Cipriani, Curzio; Emiliani, C.; Gatteschi, Dante; Romanelli, Marco

doi:10.1007/s00269-005-0449-8

Cited by 53 publications

(40 citation statements)

References 21 publications

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“…This result demonstrates that the MST is the first-order phase transition. It should be noted that v for a sample grown in the salt KCl-LiCl flux exhibits the positive value in the whole temperature range and v(T) shows no hysteresis at temperatures between 79 and 86 K. 28 The disagreement in v(T) between our and the reported samples might result from the small composition deviation.…”

Section: Resultscontrasting

confidence: 55%

Systematic study of electronic and magnetic properties for Cu12–xTMxSb4S13 (TM = Mn, Fe, Co, Ni, and Zn) tetrahedrite

Suekuni

Tomizawa

Ozaki

et al. 2014

Journal of Applied Physics

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Magnetism and superconductivity in Mn, Co, Ni, Cu, and Zn) single crystals J. Appl. Phys. 109, 07E113 (2011); 10.1063/1.3565424 Room-temperature spin glass and near band edge properties of highly disorder ( FeCo ) 0.03 Zn 0.97 O and ( FeCoNi ) 0.03 Zn 0.97 O nanorodsSubstitution effects of 3d transition metal (TM) impurities on electronic and magnetic properties for Cu 12 Sb 4 S 13 tetrahedrite are investigated by the combination of low-temperature experiments and first-principles electronic-structure calculations. The electrical resistivity for the cubic phase of Cu 12 Sb 4 S 13 exhibits metallic behavior due to an electron-deficient character of the compound. Whereas that for 0.5 x 2.0 of Cu 12Àx Ni x Sb 4 S 13 exhibits semiconducting behavior. The substituted Ni for Cu is in the divalent ionic state with a spin magnetic moment and creates impurity bands just above the Fermi level at the top of the valence band. Therefore, the semiconducting behavior of the electrical resistivity is attributed to the thermal excitation of electrons from the valence band to the impurity band. The substitution effect of TM on the electronic structure and the valency of TM for Cu 11.0 TM 1.0 Sb 4 S 13 are systematically studied by the calculation. The substituted Mn, Fe, and Co for Cu are found to be in the ionic states with the spin magnetic moments due to the large exchange splitting of the 3d bands between the minority-and majority-spin states. V C 2014 AIP Publishing LLC.

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Section: Resultscontrasting

confidence: 55%

Systematic study of electronic and magnetic properties for Cu12–xTMxSb4S13 (TM = Mn, Fe, Co, Ni, and Zn) tetrahedrite

Suekuni

Tomizawa

Ozaki

et al. 2014

Journal of Applied Physics

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“…All of the samples exhibited similar behavior except for the samples with composition Cu 12 Sb 4 S 13 , which exhibited a sharp transition at 85 K. Data for the sample consolidated by pulsed electric current sintering ((c) in Figure 1) were collected in smaller temperature increments to better define the transition temperature, but otherwise the results for this sample and the sample of equal composition consolidated by hot pressing were found to be identical. The temperature of the sharp transition is near that reported by Di Benedetto et al 5 (83 K) for a material with the same composition, which they associated with an antiferromagnetic-paramagnetic transformation.…”

Section: Methodssupporting

confidence: 50%

Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites

Lara‐Curzio

May

Delaire

et al. 2014

Journal of Applied Physics

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“…11 This is manifested as a metal-insulator transition with a corresponding dip in the magnetic susceptibility upon cooling, 11,31 which is reminiscent of a charge density wave state. The transition is suppressed by a variety of dopants, though its origins have not been identified.…”

Section: 2930mentioning

confidence: 99%

Structural phase transition and phonon instability inCu12Sb4S13

et al. 2016

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A structural phase transition has been discovered in the synthetic tetrahedrite Cu12Sb4S13 at approximately 88 K. Upon cooling, the material transforms from its known cubic symmetry to a tetragonal unit cell that is characterized by an in-plane ordering that leads to a doubling of the unit cell volume. Specific heat capacity measurements demonstrate a hysteresis of more than two degrees in the associated anomaly. Similar hysteresis was observed in powder x-ray diffraction measurements that also indicate a coexistence of the two phases, and together these results suggest a first order transition. This structural transition coincides with a recently-reported metal-insulator transition, and the structural instability is related to the very low thermal conductivity κ in these materials. Inelastic neutron scattering was used to measure the phonon density of states in Cu12Sb4S13 and Cu10Zn2Sb4S13, both of which possess a localized, low-energy phonon mode associated with strongly anharmonic copper displacements that suppress κ. In Cu12Sb4S13, signatures of the phase transition are observed in the temperature dependence of the localized mode, which disappears at the structural transition. In contrast, in the cubic Zn-doped material the mode is at slightly higher-energy but observable for all temperatures, though it softens upon cooling.

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The distribution of Cu(II) and the magnetic properties of the synthetic analogue of tetrahedrite: Cu12Sb4S13

Cited by 53 publications

References 21 publications

Systematic study of electronic and magnetic properties for Cu12–xTMxSb4S13 (TM = Mn, Fe, Co, Ni, and Zn) tetrahedrite

Systematic study of electronic and magnetic properties for Cu12–xTMxSb4S13 (TM = Mn, Fe, Co, Ni, and Zn) tetrahedrite

Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites

Structural phase transition and phonon instability inCu12Sb4S13

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