Magnetic properties of the Zn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>spinel

Schiessl, W.; Potzel, W.; Karzel, Helmut; Steiner, Markus J.; Kalvius, G. M.; Martín, A.; Krause, Mario; Halevy, I.; Gál, J.; Schäfer, Wolfgang; Will, G.; Hillberg, M.; Wäppling, R.

doi:10.1103/physrevb.53.9143

Cited by 272 publications

(141 citation statements)

References 16 publications

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“…In such a case, the low-symmetry structure could be different from the tetragonal. It is also possible that below T N the magnetic order has only a short-range character (similar to spin ice), or the long--range order coexists with the short-range order like in the ZnFe 2 O 4 spinel [33].…”

Section: Discussionmentioning

confidence: 99%

Comparative Study of the Electronic Structures of Fe₃O₄and Fe₂SiO₄

2010

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The electronic properties of two spinels Fe 3 O 4 and Fe 2 SiO 4 are studied by the density functional theory. The local Coulomb repulsion U and the Hund exchange J between the 3d electrons on iron are included. For U = 0, both spinels are half-metals, with the minority t 2g states at the Fermi level. Magnetite remains a metal in a cubic phase even at large values of U . The metal-insulator transition is induced by the X 3 phonon, which lowers the total energy and stabilizes the charge-orbital ordering. Fe 2 SiO 4 transforms to a Mott insulating state for U > 2 eV with a gap ∆ g ∼ U . The antiferromagnetic interactions induce the tetragonal distortion, which releases the geometrical frustration and stabilizes the long-range order. The differences of electronic structures in the high-symmetry cubic phases and the distorted low-symmetry phases of both spinels are discussed.

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Section: Discussionmentioning

confidence: 99%

Comparative Study of the Electronic Structures of Fe₃O₄and Fe₂SiO₄

2010

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“…Ferromagnetic resonance (FMR) measurements have further revealed a strong dependence on the ZFO phase concentration, especially in regard to the relaxation processes. The temperature dependence of the FMR spectra for samples with > 0 9 has shown that the magnetic response is dominated by γ-Fe 2 O 3 magnetic nanoparticles with strong magnetic anisotropy, with no essential contribution from the ZFO ferrite 1 .…”

Section: Introductionmentioning

confidence: 99%

“…Zinc ferrite ZnFe 2 O 4 (ZFO) belongs to one of the most important iron oxides with very interesting magnetic properties, which are intensively investigated from theoretical and experimental points of view [1][2][3][4][5][6][7][8][9][10][11][12]. Bulk magnetic ordering occurs at low temperatures with a critical point that depends strongly on the ZFO preparation conditions.…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of ZnFe2O4 nanoparticles

Guskos¹,

Glenis

Typek

et al. 2012

Open Physics

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Abstract:Fine particles of ZnFe 2 O 4 were synthesized by a wet chemical method in the (80 wt. % Fe 2 O 3 + 20 wt. % ZnO) system. The morphological and structural properties of the mixed system were investigated by scanning electron microscopy, X-ray diffraction, inductively coupled plasma atomic emission, and X-ray photoelectron spectroscopy. The major phase was determined to be the ZnFe 2 O 4 spinel with particle size of 11 nm. The magnetic properties of the material were investigated by ferromagnetic resonance (FMR) in the temperature range from liquid helium to room temperature. A very intense, asymmetric FMR signal from ZnFe 2 O 4 nanoparticles was recorded, which has been analyzed in terms of two Callen-lineshape lines.

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“…1(b)). 6 For AFe 2 O 4 with Θ W ≃ 120 K (A = Zn) and ≃ −50 K (A = Cd), neutron scattering experiments in the high-purity single crystals observed neither long-range magnetic ordering nor a structural transition down to low temperature (1.5 K) although an AF-transition-like anomaly occurs in the magnetic susceptibility at T * ≃ 13 K (Fig. 1(c)).…”

mentioning

confidence: 99%

“…1(b)), the anomaly in C Γ (T ) should have a magnetic origin where the spin degrees of freedom play a significant role. 6 Note that the elastic anomalies emerge at temperatures where the magnetic susceptibility exhibits the deviation from the CurieWeiss law ( Fig. 1(d)).…”

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confidence: 99%

Acoustic study of dynamical molecular-spin state without magnetic phase transition in spin-frustratedZnFe2O4

et al. 2015

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Ultrasound velocity measurements were performed on a single crystal of spin-frustrated ferrite spinel ZnFe2O4 from 300 K down to 2 K. In this cubic crystal, all the symmetrically-independent elastic moduli exhibit softening with a characteristic minimum with decreasing temperature below ∼100 K. This elastic anomaly suggests a coupling between dynamical lattice deformations and molecular-spin excitations. In contrast, the elastic anomalies, normally driven by the magnetostructural phase transition and its precursor, are absent in ZnFe2O4, suggesting that the spin-lattice coupling cannot play a role in relieving frustration within this compound. The present study infers that, for ZnFe2O4, the dynamical molecular-spin state evolves at low temperatures without undergoing precursor spin-lattice fluctuations and spin-lattice ordering. It is expected that ZnFe2O4 provides the unique dynamical spin-lattice liquid-like system, where not only the spin molecules but also the cubic lattice fluctuate spatially and temporally.

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Magnetic properties of the ZnFe2O4spinel

Cited by 272 publications

References 16 publications

Comparative Study of the Electronic Structures of Fe₃O₄and Fe₂SiO₄

Comparative Study of the Electronic Structures of Fe₃O₄and Fe₂SiO₄

Magnetic properties of ZnFe2O4 nanoparticles

Acoustic study of dynamical molecular-spin state without magnetic phase transition in spin-frustratedZnFe2O4

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Magnetic properties of the ZnFe2O4spinel

Cited by 272 publications

References 16 publications

Comparative Study of the Electronic Structures of Fe3O4and Fe2SiO4

Comparative Study of the Electronic Structures of Fe3O4and Fe2SiO4

Magnetic properties of ZnFe2O4 nanoparticles

Acoustic study of dynamical molecular-spin state without magnetic phase transition in spin-frustratedZnFe2O4

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Product

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Comparative Study of the Electronic Structures of Fe₃O₄and Fe₂SiO₄

Comparative Study of the Electronic Structures of Fe₃O₄and Fe₂SiO₄