473 research outputs found
ESR Modes in CsCuCl3 in Pulsed Magnetic Fields
We present ESR results for 35-134GHz in the antiferromagnet CsCuCl3 at
T=1.5K. The external field is applied perpendicular to the hexagonal c-axis.
With our pulsed field facility we reach 50T an unprecedented field for low
temperature ESR. We observe strong resonances up to fields close to the
ferromagnetic region of ~30T. These results are discussed in a model for
antiferromagnetic modes in a two-dimensional frustrated triangular spin system.Comment: 3 pages, RevTeX, 3 figures. to be published in Solid State
Communication
SNSF Career Tracker Cohorts (CTC) Newsletter 2022/2
As in our previous newsletter, we explore our first longitudinal dataset to give insights on working conditions and changes of professional values in the last years. The data include the first four waves (2018–2021) of the CTC-18 cohort, which consists of people who applied for Early Postdoc.Mobility or Postdoc.Mobility in fall 201
Acoustic Faraday effect in TbGaO
The transverse acoustic wave propagating along the [100] axis of the cubic
TbGaO (acoustic mode) is doubly degenerate. A magnetic
field applied in the direction of propagation lifts this degeneracy and leads
to the rotation of the polarization vector - the magneto-acoustic Faraday
rotation. Here, we report on the observation and analysis of the
magneto-acoustic Faraday-effect in TbGaO in static and pulsed
magnetic fields. We present also a theoretical model based on magnetoelastic
coupling of 4 electrons to both, acoustic and optical phonons and an
effective coupling between them. This model explains the observed linear
frequency dependence of the Faraday rotation angle
SNSF Career Tracker Cohorts (CTC) Newsletter 2022/1
This newsletter shows the first results of a longitudinal analysis of the CTC-18 cohort, which consists of people who applied for Early Postdoc.Mobility and Postdoc.Mobility in fall 2018. The following results are preliminary as the data preparation has not been completed ye
SNSF Career Tracker Cohorts (CTC) Newsletter 2023/1
This year marks the fifth anniversary of the CTC study, and we are looking forward to continuing with the monitoring. Before we start the spring surveys, we are preparing the data collected last fall (2022), when 633 study participants completed a CTC monitoring survey, resulting in an overall response rate of 59%
Critical Phenomena at the Antiferromagnetic Phase Transition of Azurite
We report on high-resolution acoustic, specific-heat and thermal expansion
measurements in the vicinity of the antiferromagnetic phase transition at T_N =
1.88 K on a high-quality single crystal of the natural mineral azurite. A
detailed investigation of the critical contribution to the various quantities
at T_N is presented. The set of critical exponents and amplitude ratios of the
singular contributions above and below the transition indicate that the system
can be reasonably well described by a three-dimensional Heisenberg
antiferromagnet.Comment: 9 pages, 3 figures, proceedings of ICM 2012, JKP
Sound attenuation in the superconducting amorphous alloy ZrTiCuNiBe
The superconducting energy gap and the parameter of the intensity of electron
scattering at two-level systems in amorphous ZrTiCuNiBe are determined from the
results of measurements of sound attenuation. The mechanism of adiabatic
renormalization of the amplitude of coherent tunneling is used for a
quantitative description of the peculiarities of sound absorption in the
vicinity of critical temperature.Comment: 4 pages, LaTeX, 2 Postscript figures corrected, submitted to Low
Temp. Phy
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