Publications related to A Vibrational Study Of Phase-Transitions Among The GeO2 Polymorphs

Vibrational properties of rare-earth nitrides: Raman spectra and theory

Raman spectra are presented for the rare-earth nitrides SmN, GdN, DyN, ErN, and LuN measured with 633 and 514 nm excitation wavelengths and at temperatures above and below the Curie temperature. Frozen-phonon calculations are presented for the phonons at G ...

2009

Detection of buried microstructures by nonlinear light scattering spectroscopy

Sylvie Roke, Hilton Barbosa De Aguiar

Many processes in chemistry and physics rely on the structure, growth or change of material buried in solids. The impenetrable surrounding medium often prohibits the study of such material in situ. Nonlinear light scattering can be used to observe the inte ...

2009

The chemistry of single-walled nanotubes

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A review. The unique structural, electronic, and mech. properties of single-walled carbon nanotubes (SWNTs) have opened the doors to developments that push the limits of science. These advancements not only further scientific discovery, but also result in ...

2009

Differential-thermal analysis around and below the critical temperature T-c of various low-T-c superconductors: A comparative study

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We present specific-heat data on the type-II superconductors V3Si, LuNi2B2C and NbSe2 which were acquired with a low-temperature thermal analysis (DTA) technique. We compare our data with available literature data on these superconductors. In the first par ...

2008

Magnetic crossover and complex excitation spectrum of the ferromagnetic/antiferromagnetic spin-1/2 chain system alpha-TeVO4

Helmuth Berger

We report magnetic-susceptibility, specific-heat, and Raman-scattering investigations of alpha-TeVO4 containing V-O edge-sharing chains. These chains promote a system of ferromagnetic/antiferromagnetic spin-1/2 Heisenberg alternating exchange chains with p ...

2008

Raman spectroscopy of (K,Na)NbO3 and (K,Na)(1-x)LixNbO3

Nava Setter, Dragan Damjanovic, Harry Joseph Trodahl, Naama Klein

We report Raman spectroscopy in all four phases of a (K0.5+delta Na0.5-delta)NbO3 (delta similar to 0.03) crystal and ((K0.5+delta Na0.5-delta)(1-x)Li-x)NbO3 for x=0.02 and 0.03. The phase transitions in the Li-free crystal are homogeneous and hysteretic, ...

2008

Thermodynamics of the Spin Luttinger Liquid in a Model Ladder Material

Bruce Normand, Pierre Bouillot, Daniel Biner

The phase diagram in temperature and magnetic field of the metal-organic, two-leg, spin-ladder compound (C5H12N)(2)CuBr4 is studied by measurements of the specific heat and the magnetocaloric effect. We demonstrate the presence of an extended spin Luttinge ...

2008

From quantum glass to addressable spin clusters in the model magnet LiHoxY1−xF4

Tatjana Hählen

This report describes an AC-susceptibility study on

LiHo_xY_{1−x}F_4

.

LiHo_xY_{1−x}F_4 has different phases depending on the concentration x of holmium. Pure

LiHoF_4

is a ferromagnet, at concentrations of

x \approx 0.20$ it is a spin glass and at con ...

2007

A structural investigation of the four phases of 7-oxabicyclo[2.2.1]heptane

Philip Pattison

Powder synchrotron X-ray diffraction studies confirm that 7-oxabicyclo[2.2.1]heptane, (oxanorbornane), forms three solid phases on cooling and four on warming, as previously indicated by spectroscopic and DSC meas urements. The two highest temperature phas ...

2007

Noncentrosymmetric phase of submicron NaNbO3 crystallites

Arnaud Magrez

The temperature and pressure characteristics of a noncentrosymmetric crystal modification of NaNbO3 were studied by Raman spectroscopy. A transition towards the bulk-like structure of NaNbO3 occurs in the temperature range from 280 to 360 °C. High-pressure ...

2007

A Vibrational Study Of Phase-Transitions Among The GeO2 Polymorphs

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Vibrational properties of rare-earth nitrides: Raman spectra and theory

Detection of buried microstructures by nonlinear light scattering spectroscopy

The chemistry of single-walled nanotubes

Differential-thermal analysis around and below the critical temperature T-c of various low-T-c superconductors: A comparative study

Magnetic crossover and complex excitation spectrum of the ferromagnetic/antiferromagnetic spin-1/2 chain system alpha-TeVO4

Raman spectroscopy of (K,Na)NbO3 and (K,Na)(1-x)LixNbO3

Thermodynamics of the Spin Luttinger Liquid in a Model Ladder Material

From quantum glass to addressable spin clusters in the model magnet LiHoxY1−xF4

A structural investigation of the four phases of 7-oxabicyclo[2.2.1]heptane

Noncentrosymmetric phase of submicron NaNbO3 crystallites

Vibrational properties of rare-earth nitrides: Raman spectra and theory

Raman spectroscopy of (K,Na)NbO3 and (K,Na)(1-x)LixNbO3

Detection of buried microstructures by nonlinear light scattering spectroscopy

The chemistry of single-walled nanotubes

Differential-thermal analysis around and below the critical temperature T-c of various low-T-c superconductors: A comparative study

From quantum glass to addressable spin clusters in the model magnet LiHoxY1−xF4

Magnetic crossover and complex excitation spectrum of the ferromagnetic/antiferromagnetic spin-1/2 chain system alpha-TeVO4

Thermodynamics of the Spin Luttinger Liquid in a Model Ladder Material

A structural investigation of the four phases of 7-oxabicyclo[2.2.1]heptane

Noncentrosymmetric phase of submicron NaNbO3 crystallites