Elasticity measurements in the layered dichalcogenides Ta<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Se</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>and Nb<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Se</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml

Barmatz, M.; Testardi, L. R.; Salvo, F. J. Di

doi:10.1103/physrevb.12.4367

Cited by 123 publications

(48 citation statements)

References 25 publications

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“…T p1 is independent of frequency and the elastic modulus shows a cusp at a temperature 2-10°C higher than T p1 . All these characteristics of DMA results suggest that the FE-to-AFE transition could be caused by the incommensurate modulation [11] of rhombohedral structures.…”

Section: Introductionmentioning

confidence: 87%

Electro-caloric behaviors of lead-free Bi0.5Na0.5TiO3-BaTiO3 ceramics

Zheng

Lin

et al. 2011

J Electroceram

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Electro-caloric (EC) properties of lead-free Ba 0.5 Na 0.5 TiO 3 -xBaTiO 3 (BNT-xBT) ceramics prepared by citrate method are investigated at temperatures of 30-250°C. Based on thermodynamics calculations, BNT-xBT (x00, 0.05, 0.06, 0.1, 0.25, 0.3) are found to show EC effects different with other lead-based or lead-free ferroelectric ceramics, i.e., they absorb heats (refrigeration effect) during the processes of field application while other ferroelectric ceramics show refrigeration effect during the processes of field removal. The EC temperature change of BNT-xBT can be as large as 2.1°C under an electric field of 60 kV/cm, which is larger than most of the lead-free ferroelectric bulk ceramics. When x is close to the morphotropic phase boundary (x~0.06-0.1), the EC temperature change of BNT-xBT shows a maximum near the ferroelectric to anti-ferroelectric transition temperature, which is characterized by dynamic mechanical analysis. This study suggests that these lead-free ferroelectric materials are promising in the practical application as EC coolers.

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Section: Introductionmentioning

confidence: 87%

Electro-caloric behaviors of lead-free Bi0.5Na0.5TiO3-BaTiO3 ceramics

Zheng

Lin

et al. 2011

J Electroceram

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“…An alternative possibility is a lock-in transition to commensurate ordering, that is, δ 2 → 1/3. Such lock-in transitions are common in CDW systems 16 and are accompanied by anomalies in the elastic constants 31 and, therefore, we deem this more likely.…”

Section: A Charge Orderingmentioning

confidence: 97%

Inelastic x-ray study of phonon broadening and charge-density wave formation in ortho-II-ordered YBa2Cu3O6.54
Blackburn
¹
,
Chang
²
,
Said
³

et al. 2013
Phys. Rev. B
66
3
61
0
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Inelastic x-ray scattering is used to investigate charge-density wave (CDW) formation and the low-energy lattice dynamics of the underdoped high-temperature superconductor ortho-II YBa 2 Cu 3 O 6.54 . We find that, for a temperature ∼1/3 of the CDW onset temperature (≈155 K), the CDW order is static within the resolution of the experiment, that is the inverse lifetime is less than 0.3 meV. In the same temperature region, low-energy phonons near the ordering wave vector of the CDW show large increases in their linewidths. This contrasts with the usual behavior in CDW systems where the phonon anomalies are strongest near the CDW onset temperature.

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“…The vibrating reed method involves measurement of the flexural oscillations of a thin rectangular reed (made of single-crystal Si wafer, in this case) of length l, width w, and thickness t, clamped at one end in a cantilever geometry [5][6][7]. When a vibrating reed is loaded on its free end with a superconducting sample and is subjected to applied magnetic fields and/or temperature variations, anomalies in the inverse quality factor, 1/Q, and normalized resonant frequency shift, Af/f, of the Si reed resonances may be observed, as shown in Fig.…”

Section: Vibrating Reed Techniquementioning

confidence: 99%

Vibrating reed study of the flux line dynamics of κ-(ET)2Cu[N(CN)2]Br

et al. 1994

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Vibrating reed measurements were performed on single-crystal samples of ~c-(ET)2-Cu[N(CN)2]Br in an applied magnetic field H oriented either parallel ("longitudinal") or perpendicular ("transverse") to the highly conducting ac-plane. Field-cooling data taken for the longitudinal orientation and H< 0.7 T revealed a peak with a low-temperature shoulder in the reed dissipation 1/Q located at temperature TQ below the superconducting transition temperature T~ (~ 11.6 for H= 0). The shoulder disappeared near H~0.

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Elasticity measurements in the layered dichalcogenides TaSe2and NbSe2

Cited by 123 publications

References 25 publications

Electro-caloric behaviors of lead-free Bi0.5Na0.5TiO3-BaTiO3 ceramics

Electro-caloric behaviors of lead-free Bi0.5Na0.5TiO3-BaTiO3 ceramics

Inelastic x-ray study of phonon broadening and charge-density wave formation in ortho-II-ordered YBa2Cu3O6.54
Blackburn
¹
,
Chang
²
,
Said
³

et al. 2013
Phys. Rev. B
66
3
61
0
View full text Add to dashboard Cite

Vibrating reed study of the flux line dynamics of κ-(ET)2Cu[N(CN)2]Br

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Elasticity measurements in the layered dichalcogenides TaSe2and NbSe2

Cited by 123 publications

References 25 publications

Electro-caloric behaviors of lead-free Bi0.5Na0.5TiO3-BaTiO3 ceramics

Electro-caloric behaviors of lead-free Bi0.5Na0.5TiO3-BaTiO3 ceramics

Inelastic x-ray study of phonon broadening and charge-density wave formation in ortho-II-ordered YBa2Cu3O6.54Blackburn1, Chang2, Said3 et al. 2013Phys. Rev. B663610View full textAdd to dashboardCite

Vibrating reed study of the flux line dynamics of κ-(ET)2Cu[N(CN)2]Br

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Inelastic x-ray study of phonon broadening and charge-density wave formation in ortho-II-ordered YBa2Cu3O6.54
Blackburn
¹
,
Chang
²
,
Said
³

et al. 2013
Phys. Rev. B
66
3
61
0
View full text Add to dashboard Cite