Contributions of phonon and vacancy excitations to thermodynamic properties of solid helium

Ye O. Vekhov; V. N. Grigor'ev; V. A. Maidanov; N. P. Mikhin; V. Yu Rubanskiy; S. P. Rubets; E. Ya Rudavskii; A. S. Rybalko; Ye V. Syrnikov; V. A. Tikhiy

Contributions of phonon and vacancy excitations to thermodynamic properties of solid helium

Ye O. Vekhov
, V. N. Grigor'ev
, V. A. Maidanov
, N. P. Mikhin
, V. Yu Rubanskiy
, S. P. Rubets
, E. Ya Rudavskii
, A. S. Rybalko
, Ye V. Syrnikov
, V. A. Tikhiy

SNS Low Temperature and Magnets

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

7 Scopus citations

Abstract

Precise measurements of the temperature dependence of pressure were carried out on high quality crystals of ⁴He and ³He- ⁴He solutions grown under constant volume conditions. The phonon and vacancy contributions to pressure were estimated within Debye's model of phonons and the model of wide band vacancions. The other available thermodynamic data were analyzed for pure solid helium isotopes and their solutions using this approch. The Debye temperatures and vacancy activation energies have been obtained and the universal molar volume dependence of these parameters has been found for He, He and He- He solutions. The corresponding Grüneisen parameters have been obtained, which appear to be independent of the molar volume.

Original language	English
Pages (from-to)	835-843
Number of pages	9
Journal	Fizika Nizkikh Temperatur (Kharkov)
Volume	33
Issue number	8
State	Published - Aug 2007

Keywords

Debye temperature
Gruneisen parameter
Phonons
Solid helium
Solid solutions He- He
Vacancies
Vacancy activation energy

Cite this

@article{95ad8fc610f2454fbf8e8ee614ac9515,

title = "Contributions of phonon and vacancy excitations to thermodynamic properties of solid helium",

abstract = "Precise measurements of the temperature dependence of pressure were carried out on high quality crystals of 4He and 3He- 4He solutions grown under constant volume conditions. The phonon and vacancy contributions to pressure were estimated within Debye's model of phonons and the model of wide band vacancions. The other available thermodynamic data were analyzed for pure solid helium isotopes and their solutions using this approch. The Debye temperatures and vacancy activation energies have been obtained and the universal molar volume dependence of these parameters has been found for He, He and He- He solutions. The corresponding Gr{\"u}neisen parameters have been obtained, which appear to be independent of the molar volume.",

keywords = "Debye temperature, Gruneisen parameter, Phonons, Solid helium, Solid solutions He- He, Vacancies, Vacancy activation energy",

author = "Vekhov, \{Ye O.\} and Grigor'ev, \{V. N.\} and Maidanov, \{V. A.\} and Mikhin, \{N. P.\} and Rubanskiy, \{V. Yu\} and Rubets, \{S. P.\} and Rudavskii, \{E. Ya\} and Rybalko, \{A. S.\} and Syrnikov, \{Ye V.\} and Tikhiy, \{V. A.\}",

year = "2007",

month = aug,

language = "English",

volume = "33",

pages = "835--843",

journal = "Fizika Nizkikh Temperatur (Kharkov)",

issn = "0132-6414",

number = "8",

}

TY - JOUR

T1 - Contributions of phonon and vacancy excitations to thermodynamic properties of solid helium

AU - Vekhov, Ye O.

AU - Grigor'ev, V. N.

AU - Maidanov, V. A.

AU - Mikhin, N. P.

AU - Rubanskiy, V. Yu

AU - Rubets, S. P.

AU - Rudavskii, E. Ya

AU - Rybalko, A. S.

AU - Syrnikov, Ye V.

AU - Tikhiy, V. A.

PY - 2007/8

Y1 - 2007/8

N2 - Precise measurements of the temperature dependence of pressure were carried out on high quality crystals of 4He and 3He- 4He solutions grown under constant volume conditions. The phonon and vacancy contributions to pressure were estimated within Debye's model of phonons and the model of wide band vacancions. The other available thermodynamic data were analyzed for pure solid helium isotopes and their solutions using this approch. The Debye temperatures and vacancy activation energies have been obtained and the universal molar volume dependence of these parameters has been found for He, He and He- He solutions. The corresponding Grüneisen parameters have been obtained, which appear to be independent of the molar volume.

AB - Precise measurements of the temperature dependence of pressure were carried out on high quality crystals of 4He and 3He- 4He solutions grown under constant volume conditions. The phonon and vacancy contributions to pressure were estimated within Debye's model of phonons and the model of wide band vacancions. The other available thermodynamic data were analyzed for pure solid helium isotopes and their solutions using this approch. The Debye temperatures and vacancy activation energies have been obtained and the universal molar volume dependence of these parameters has been found for He, He and He- He solutions. The corresponding Grüneisen parameters have been obtained, which appear to be independent of the molar volume.

KW - Debye temperature

KW - Gruneisen parameter

KW - Phonons

KW - Solid helium

KW - Solid solutions He- He

KW - Vacancies

KW - Vacancy activation energy

UR - https://www.scopus.com/pages/publications/34547680074

M3 - Review article

AN - SCOPUS:34547680074

SN - 0132-6414

VL - 33

SP - 835

EP - 843

JO - Fizika Nizkikh Temperatur (Kharkov)

JF - Fizika Nizkikh Temperatur (Kharkov)

IS - 8

ER -

Contributions of phonon and vacancy excitations to thermodynamic properties of solid helium

Abstract

Keywords

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