Skull melter growth of magnetite (Fe3O4)

Harrison, H. R.; Aragón, R.

doi:10.1016/0025-5408(78)90195-2

Cited by 74 publications

(17 citation statements)

References 9 publications

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“…The measured crystals were grown from the melt using the cold crucible technique and subsequently annealed for desired off-stoichiometry parameter d [4,5]. NMR spectra were measured by the spin-echo method using the phase-coherent pulse spectrometer with an averaging technique and Fourier transformation.…”

Section: Methodsmentioning

confidence: 99%

Electronic structure and hyperfine fields in non-stoichiometric magnetite above the Verwey transition

Chlan

Novák

Štěpánková

et al. 2010

Journal of Magnetism and Magnetic Materials

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Section: Methodsmentioning

confidence: 99%

Electronic structure and hyperfine fields in non-stoichiometric magnetite above the Verwey transition

Chlan

Novák

Štěpánková

et al. 2010

Journal of Magnetism and Magnetic Materials

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“…As transducers we used piezoelectric foils for the longitudinal modes and quartz plates for shear waves. The single crystals of Fe 3−x Zn x O 4 were grown by the cold crucible technique (skull melting) [12] at Purdue University. The crystals were then subjected to subsolidus annealing under CO/CO 2 gas mixtures to establish appropriate metal/oxygen ratio [13].…”

Section: Elastic Constantsmentioning

confidence: 99%

Charge ordering and elastic constants in Fe Zn O

et al. 2000

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We present the temperature dependence of elastic modes of Fe3−xZnxO4 with x = 0, x = 0.02 and x = 0.032. The c44 shear modes show a pronounced softening which can be normalized to a common behavior for all these substances. We can explain the softening with a bilinear coupling of the elastic strain to an order parameter linked to charge ordering processes. The other elastic modes (c11, c12 and the bulk modulus) do not show any softening. We present a symmetry analysis for the charge ordering model. PACS. 71.30.+h Metal-insulator transitions and other electronic transitions -62.65.+k Acoustical properties of solids -75.40.Cx Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)

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“…Single crystals used in our experiments were grown under a CO 2 atmosphere using the cold-crucible skull-melter technique [5]. The starting materials were 99.995% purity Fe2O3 and 99.9 purity ZnO.…”

Section: Methodsmentioning

confidence: 99%

Heat Capacity and Elastic Constants of Fe_3-xZn_xO₄in the Vicinity of the Verwey Transition

et al. 2000

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The results of the heat capacity and elastic constant studies of Fe3-x Ζn x O 4 (x < 0.04) series are reported. Adiabatic heat capacity measurements, performed on single crystals, show the clear change of the transition character from first order for low Zn content (x < 0.012) to the higher order in 0.012 < x < 0.035 regime. The change of transition order is accompanied by the change in the heat capacity base lines below the Verwey transition temperature Tv. From the elastic constants measurements we found that cli, (Cl1 -c12) and c44 modes exhibit anomalies at Tv but only shear wave c44 show critical softening while approaching transition from high temperatures. This behavior can be linked to the results obtained by the heat capacity studies. These point to the important role of the lattice contribution to the mechanism of the Verwey transition.

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Skull melter growth of magnetite (Fe3O4)

Cited by 74 publications

References 9 publications

Electronic structure and hyperfine fields in non-stoichiometric magnetite above the Verwey transition

Electronic structure and hyperfine fields in non-stoichiometric magnetite above the Verwey transition

Charge ordering and elastic constants in Fe Zn O

Heat Capacity and Elastic Constants of Fe_3-xZn_xO₄in the Vicinity of the Verwey Transition

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Skull melter growth of magnetite (Fe3O4)

Cited by 74 publications

References 9 publications

Electronic structure and hyperfine fields in non-stoichiometric magnetite above the Verwey transition

Electronic structure and hyperfine fields in non-stoichiometric magnetite above the Verwey transition

Charge ordering and elastic constants in Fe Zn O

Heat Capacity and Elastic Constants of Fe3-xZnxO4in the Vicinity of the Verwey Transition

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Product

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Heat Capacity and Elastic Constants of Fe_3-xZn_xO₄in the Vicinity of the Verwey Transition