Heat capacity of<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>3</mml:mn><mml:mi mathvariant="normal">−</mml:mi><mml:mi mathvariant="normal">α</mml:mi></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="italic">M</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="norma

Kozłowski, A.; Ka̧kol, Z.; D, Kim; Zalecki, R.; Jm, Honig

doi:10.1103/physrevb.54.12093

Cited by 43 publications

(24 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The change of transition order reflected in the shape of specific heat anomalies is accompanied by the clear change of heat capacity base line below TV [6]. Above the transition the base lines nearly coincide, while below Tv they are split (Fig.…”

Section: Resultsmentioning

confidence: 97%

“…1, where the characteristic Debye temperature θD is plotted against T; here the transition peaks were removed for clarity. To understand this phenomenon we have analyzed several possible contributions to the heat capacity and we have found, in conclusion, that most likely it results from the difference in lattice dynamics for both types of specimens below the transition [6] .…”

Section: Resultsmentioning

confidence: 99%

“…Heat capacity was measured by adiabatic method in the temperature range 40-200 K [6], while for the elastic constants and attenuation studies a phase comparison and a phase sensitive (quadrature) method were used. To avoid magnetic domain effects elastic constants were measured in the external magnetic field ρ 0 Η 0.4-0.6 Τ.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2000

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2000

Self Cite

View full text Add to dashboard Cite

show abstract

“…The high quality single crystals of magnetite were grown by the Skull-Melter technique in the group of Prof. Honig, Chemistry Department, Purdue University, Indiana, USA. The characterization of the Verwey transition in the bulk has been thoroughly investigated [7]. For the LEIS experiments we have used the surfaces cut perpendicularly to the crystallographic direction (001) and (111).…”

Section: Methodsmentioning

confidence: 99%

“…The single-crystalline plate BaTiO 3 of about 1 mm thickness with the preferable c-axis perpendicular to the plate was used for the LEIS investigations. The characterization of the "bulk" Verwey transition of magnetite [7], of the magnetic phase transition of NdMn 2 [5] and the ferroelectric properties of BaTiO 3 [8] have been thoroughly investigated. For all three surfaces an annealing in situ was done at temperatures 500-600 K in UHV.…”

Section: Methodsmentioning

confidence: 99%

Surface Investigations of Selected Materials by Low-Energy Ion Scattering Technique

et al. 2007

View full text Add to dashboard Cite

Surfaces of three selected materials were investigated by means of low--energy ion-scattering technique: (1) the magnetite (Fe 3 O 4 ) exhibiting the so-called Verwey transition (TV(bulk) = 125 K) accompanied by a small cubic-monoclinic crystal distortion, (2) the intermetallic compound NdMn2 undergoing an antiferromagnetic-paramagnetic phase transition (T N = 104 K) accompanied by a large crystal distortion with a volume change of 1%, and (3) the typical insulator BaTiO3 with two structural transitions below 300 K. The primary energy of the (Ne + , Ar + ) ion beam was in the range of 4-8 keV, and the low-energy ion-scattering spectra were collected in the temperature range of 85-300 K. A large influence from the Verwey transition on the neutralization and re-ionization of scattered ions from magnetite surface was observed, while no visible change at the magnetic phase transition in NdMn 2 was revealed in the low-energy ion-scattering spectra. A strong dependence of the characteristics of the low-energy ion-scattering spectra on the irradiated time was observed for BaTiO 3 indicating that this surface was heavily charged by ion bombardments.

show abstract

Electronic states of magnetite from photoemission spectroscopy ARUPS

Zalecki

Kołodziejczyk

Kozłowski

et al. 2006

Physica Status Solidi (b)

Self Cite

View full text Add to dashboard Cite

The valence band photoemission spectra of epitaxially grown film and bulk single crystal of magnetite were measured by the angle-resolved ultraviolet photoemission spectroscopy (ARUPS) at 300 K and 120 K. Four main features of the electron photoemission were observed at about -1.0 eV, -3.5 eV, -5.0 eV and -6.5 eV below the chemical potential; they are rather strongly dependant on structure and preparation of surface. The three higher-energy features showed significant energy dispersion. The ARUPS spectra were compared to the accessible band structure calculations. Special attention was paid to the leading edge of the emission at -1.0 eV of the low-temperature spectrum where an insulating gap should be observed.

show abstract

Heat capacity ofFe3−αM
A. Kozłowski
¹
,
Z. Ka̧kol
²
,
Kim D
³

et al.

Cited by 43 publications

References 31 publications

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

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

Surface Investigations of Selected Materials by Low-Energy Ion Scattering Technique

Electronic states of magnetite from photoemission spectroscopy ARUPS

Contact Info

Product

Resources

About

Heat capacity ofFe3−αMA. Kozłowski1, Z. Ka̧kol2, Kim D3 et al.

Cited by 43 publications

References 31 publications

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

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

Surface Investigations of Selected Materials by Low-Energy Ion Scattering Technique

Electronic states of magnetite from photoemission spectroscopy ARUPS

Contact Info

Product

Resources

About

Heat capacity ofFe3−αM
A. Kozłowski
¹
,
Z. Ka̧kol
²
,
Kim D
³

et al.

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

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