9. Lattice thermal conductivity of antiferromagnetic MnF below its Néel temperature

1963 ◽  
Vol 1 (1) ◽  
pp. 17
Keyword(s):  
Thermal Conductivity ◽  
Lattice Thermal Conductivity ◽  
Neel Temperature ◽  
Néel Temperature

Determination of the Néel temperature from measurements of the thermal conductivity of the Co3O4 antiferromagnet nanostructured in porous glass channels

2012 ◽  
Vol 54 (5) ◽  
pp. 1066-1069 ◽  
Author(s):  
Yu. A. Kumzerov ◽  
N. F. Kartenko ◽  
L. S. Parfen’eva ◽  
I. A. Smirnov ◽  
A. A. Sysoeva ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Porous Glass ◽  
Neel Temperature ◽  
Néel Temperature

Specific heat, thermal diffusivity, and thermal conductivity ofFeF2at the Néel temperature

1995 ◽  
Vol 51 (14) ◽  
pp. 8897-8903 ◽  
Author(s):  
M. Marinelli ◽  
F. Mercuri ◽  
D. P. Belanger
Keyword(s):  
Thermal Conductivity ◽  
Thermal Diffusivity ◽  
Specific Heat ◽  
Neel Temperature ◽  
Néel Temperature

The thermal conductivity of NiO and CoO at the Neel temperature

1973 ◽  
Vol 6 (15) ◽  
pp. 2525-2532 ◽  
Author(s):  
F B Lewis ◽  
N H Saunders
Keyword(s):  
Thermal Conductivity ◽  
Neel Temperature ◽  
Néel Temperature

scholarly journals Magnetic thermal conductivity far above the Néel temperature in the Kitaev-magnet candidate α−RuCl3

2017 ◽  
Vol 95 (24) ◽  
Author(s):  
Daichi Hirobe ◽  
Masahiro Sato ◽  
Yuki Shiomi ◽  
Hidekazu Tanaka ◽  
Eiji Saitoh
Keyword(s):  
Thermal Conductivity ◽  
Neel Temperature ◽  
Néel Temperature

VIBRONIC COUPLING EFFECTS AT THE NEEL TEMPERATURE IN FeCO3

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-316-C2-319
Author(s):  
D. C. Price
Keyword(s):  
Vibronic Coupling ◽  
Neel Temperature ◽  
Coupling Effects ◽  
Néel Temperature

CONTRIBUTION OF LOW-FREQUENCY LONGITUDINAL PHONONS TO THE LATTICE THERMAL CONDUCTIVITY OF DIELECTRIC SOLIDS

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-256-C6-258
Author(s):  
R. Brito-Orta ◽  
P. G. Klemens
Keyword(s):  
Thermal Conductivity ◽  
Lattice Thermal Conductivity ◽  
Low Frequency ◽  
Dielectric Solids

Lattice Thermal Conductivity Modelling of a Diatomic Nanoscale Material

2020 ◽  
Vol 10 (5) ◽  
pp. 602-609
Author(s):  
Adil H. Awad
Keyword(s):  
Thermal Conductivity ◽  
Lattice Thermal Conductivity ◽  
Phonon Scattering ◽  
Correction Term ◽  
Nanoscale Material ◽  
New Approach ◽  
Two Samples ◽  
Conductivity Modelling ◽  
Callaway Model

Introduction: A new approach for expressing the lattice thermal conductivity of diatomic nanoscale materials is developed. Methods: The lattice thermal conductivity of two samples of GaAs nanobeam at 4-100K is calculated on the basis of monatomic dispersion relation. Phonons are scattered by nanobeam boundaries, point defects and other phonons via normal and Umklapp processes. Methods: A comparative study of the results of the present analysis and those obtained using Callaway formula is performed. We clearly demonstrate the importance of the utilised scattering mechanisms in lattice thermal conductivity by addressing the separate role of the phonon scattering relaxation rate. The formulas derived from the correction term are also presented, and their difference from Callaway model is evident. Furthermore their percentage contribution is sufficiently small to be neglected in calculating lattice thermal conductivity. Conclusion: Our model is successfully used to correlate the predicted lattice thermal conductivity with that of the experimental observation.

scholarly journals Local ferroelectric polarization switching driven by nanoscale distortions in thermoelectric $${\text {Sn}}_{0.7}{\text {Ge}}_{0.3}{\text {Te}}$$

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Aastha Vasdev ◽  
Moinak Dutta ◽  
Shivam Mishra ◽  
Veerpal Kaur ◽  
Harleen Kaur ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Figure Of Merit ◽  
Room Temperature ◽  
Lattice Thermal Conductivity ◽  
Direct Evidence ◽  
Temperature Dependent ◽  
Force Microscopy ◽  
Ferroelectric Domains ◽  
Pdf Analysis ◽  
Ferroelectric Transition Temperature

AbstractA remarkable decrease in the lattice thermal conductivity and enhancement of thermoelectric figure of merit were recently observed in rock-salt cubic SnTe, when doped with germanium (Ge). Primarily, based on theoretical analysis, the decrease in lattice thermal conductivity was attributed to local ferroelectric fluctuations induced softening of the optical phonons which may strongly scatter the heat carrying acoustic phonons. Although the previous structural analysis indicated that the local ferroelectric transition temperature would be near room temperature in $${\text {Sn}}_{0.7}{\text {Ge}}_{0.3}{\text {Te}}$$ Sn 0.7 Ge 0.3 Te , a direct evidence of local ferroelectricity remained elusive. Here we report a direct evidence of local nanoscale ferroelectric domains and their switching in $${\text {Sn}}_{0.7}{\text {Ge}}_{0.3}{\text {Te}}$$ Sn 0.7 Ge 0.3 Te using piezoeresponse force microscopy(PFM) and switching spectroscopy over a range of temperatures near the room temperature. From temperature dependent (250–300 K) synchrotron X-ray pair distribution function (PDF) analysis, we show the presence of local off-centering distortion of Ge along the rhombohedral direction in global cubic $${\text {Sn}}_{0.7}{\text {Ge}}_{0.3}{\text {Te}}$$ Sn 0.7 Ge 0.3 Te . The length scale of the $${\text {Ge}}^{2+}$$ Ge 2 + off-centering is 0.25–0.10 Å near the room temperatures (250–300 K). This local emphatic behaviour of cation is the cause for the observed local ferroelectric instability, thereby low lattice thermal conductivity in $${\text {Sn}}_{0.7}{\text {Ge}}_{0.3}{\text {Te}}$$ Sn 0.7 Ge 0.3 Te .

Effect of phonon-substrate scattering on lattice thermal conductivity of monolayer MoS2

2020 ◽  
Author(s):  
Sukanya B. Patil ◽  
N. S. Sankeshwar ◽  
B. G. Mulimani
Keyword(s):  
Thermal Conductivity ◽  
Lattice Thermal Conductivity ◽  
Monolayer Mos2
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