Temperature dependent phonon density of states of the invar alloy Fe72Pt28

Nils Wiele; Hermann Franz; Winfried Petry

doi:10.1016/S0921-4526(98)01273-3

Temperature dependent phonon density of states of the invar alloy Fe₇₂Pt₂₈

Nils Wiele, Hermann Franz, Winfried Petry

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

15 Scopus citations

Abstract

Inelastic nuclear resonant absorption of synchrotron radiation was applied to determine the phonon density of states of the invar alloy Fe₇₂Pt₂₈. Using a double crystal monochromator with asymmetric Si (975) reflections we arrived at an energy resolution of 0.8 meV. Anharmonic behaviour was observed in the energy regime of the TA_{[1 1 0]} phonon branch and the highest energy optical branch. The data may be used to determine the lattice thermal expansion, the vibrational entropy and the vibrational contribution to the capacity of heat.

Original language	English
Pages (from-to)	716-718
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	263-264
DOIs	https://doi.org/10.1016/S0921-4526(98)01273-3
State	Published - Mar 1999
Event	Proceedings of the 1998 9th International Conference on Phonon Scattering in Condensed Matter, PHONONS 98 - Lancaster, Great Britain Duration: 26 Jul 1998 → 31 Jul 1998

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10.1016/S0921-4526(98)01273-3

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title = "Temperature dependent phonon density of states of the invar alloy Fe72Pt28",

abstract = "Inelastic nuclear resonant absorption of synchrotron radiation was applied to determine the phonon density of states of the invar alloy Fe72Pt28. Using a double crystal monochromator with asymmetric Si (975) reflections we arrived at an energy resolution of 0.8 meV. Anharmonic behaviour was observed in the energy regime of the TA[1 1 0] phonon branch and the highest energy optical branch. The data may be used to determine the lattice thermal expansion, the vibrational entropy and the vibrational contribution to the capacity of heat.",

author = "Nils Wiele and Hermann Franz and Winfried Petry",

year = "1999",

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doi = "10.1016/S0921-4526(98)01273-3",

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journal = "Physica B: Condensed Matter",

issn = "0921-4526",

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note = "Proceedings of the 1998 9th International Conference on Phonon Scattering in Condensed Matter, PHONONS 98 ; Conference date: 26-07-1998 Through 31-07-1998",

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T1 - Temperature dependent phonon density of states of the invar alloy Fe72Pt28

AU - Wiele, Nils

AU - Franz, Hermann

AU - Petry, Winfried

PY - 1999/3

Y1 - 1999/3

N2 - Inelastic nuclear resonant absorption of synchrotron radiation was applied to determine the phonon density of states of the invar alloy Fe72Pt28. Using a double crystal monochromator with asymmetric Si (975) reflections we arrived at an energy resolution of 0.8 meV. Anharmonic behaviour was observed in the energy regime of the TA[1 1 0] phonon branch and the highest energy optical branch. The data may be used to determine the lattice thermal expansion, the vibrational entropy and the vibrational contribution to the capacity of heat.

AB - Inelastic nuclear resonant absorption of synchrotron radiation was applied to determine the phonon density of states of the invar alloy Fe72Pt28. Using a double crystal monochromator with asymmetric Si (975) reflections we arrived at an energy resolution of 0.8 meV. Anharmonic behaviour was observed in the energy regime of the TA[1 1 0] phonon branch and the highest energy optical branch. The data may be used to determine the lattice thermal expansion, the vibrational entropy and the vibrational contribution to the capacity of heat.

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U2 - 10.1016/S0921-4526(98)01273-3

DO - 10.1016/S0921-4526(98)01273-3

M3 - Conference article

AN - SCOPUS:0032634380

SN - 0921-4526

VL - 263-264

SP - 716

EP - 718

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - Proceedings of the 1998 9th International Conference on Phonon Scattering in Condensed Matter, PHONONS 98

Y2 - 26 July 1998 through 31 July 1998

ER -

Temperature dependent phonon density of states of the invar alloy Fe₇₂Pt₂₈

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