Acoustically driven ferroelastic domain switching observed by time-resolved x-ray diffraction

Navirian, Hengameh Allaf; Enquist, Henrik; Nüske, Ralf; Jurgilaitis, A.; Schmising, Clemens von Korff; Sondhauss, Peter; Larsson, Jörgen

doi:10.1103/physrevb.81.024113

Cited by 5 publications

(6 citation statements)

References 32 publications

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“…The time resolution is limited by the decay time of the scintillator to approximately 2 ns. This acquisition mode directly uses the 16-bit analog-todigital converter (ADC) of the PicoHarp to simultaneously acquire 2 16 time channels with a temporal gate width of 512 ps, which amounts to a simultaneous measurement time window up to 33 ms after a trigger pulse has started the measurement (Shayduk et al, 2011;Navirian et al, 2012). The diffraction curves for every time channel are subsequently extracted using a Matlab or Python script as described in Section 3.3.…”

Section: Detection Schemes For Time-resolved Experiments With Differementioning

confidence: 99%

“…Therefore the laser and the detectors are synchronized to the arrival time of the X-ray pulses that is derived from the synchrotron radiofrequency RF ' 500 MHz, which is also fed into the laser synchronization unit (see Section 2.3). A delay generator (Stanford Research Systems DG645) generates the detector gate signal (Navirian et al, 2012), which enables the area pixel detector at the repetition rate of the laser only during the arrival of the camshaft X-ray pulses to which the laser-excitation is synchronized (Ejdrup et al, 2009). Using a gated detector allows us to work without complex mechanical devices like high-speed choppers (Cammarata et al, 2009;Plogmaker et al, 2012;Fö rster et al, 2015) or excitation of the electron bunches either with a laser (Beaud et al, 2007) or the local manipulation of the electron orbit (Holldack et al, 2014).…”

Section: Detection Schemes For Time-resolved Experiments With Different Excitation Conditionsmentioning

confidence: 99%

“…Time-resolved hard X-ray diffraction is a technique to directly study the structural response of matter in the time domain. In the following, we highlight the potential of the XPP endstation and describe the significant improvements compared with previous installations (Navirian et al, 2012), especially in view of laser excitation and electrical field studies.…”

Section: Introductionmentioning

confidence: 99%

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The time-resolved hard X-ray diffraction endstation KMC-3 XPP at BESSY II

et al. 2021

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The time-resolved hard X-ray diffraction endstation KMC-3 XPP for optical pump/X-ray probe experiments at the electron storage ring BESSY II is dedicated to investigating the structural response of thin film samples and heterostructures after their excitation with ultrashort laser pulses and/or electric field pulses. It enables experiments with access to symmetric and asymmetric Bragg reflections via a four-circle diffractometer and it is possible to keep the sample in high vacuum and vary the sample temperature between ∼15 K and 350 K. The femtosecond laser system permanently installed at the beamline allows for optical excitation of the sample at 1028 nm. A non-linear optical setup enables the sample excitation also at 514 nm and 343 nm. A time-resolution of 17 ps is achieved with the `low-α' operation mode of the storage ring and an electronic variation of the delay between optical pump and hard X-ray probe pulse conveniently accesses picosecond to microsecond timescales. Direct time-resolved detection of the diffracted hard X-ray synchrotron pulses use a gated area pixel detector or a fast point detector in single photon counting mode. The range of experiments that are reliably conducted at the endstation and that detect structural dynamics of samples excited by laser pulses or electric fields are presented.

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Section: Detection Schemes For Time-resolved Experiments With Differementioning

confidence: 99%

Section: Detection Schemes For Time-resolved Experiments With Different Excitation Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The time-resolved hard X-ray diffraction endstation KMC-3 XPP at BESSY II

et al. 2021

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“…The dynamics of the spin or remnant dielectric polarization within these devices can be probed in situ in applied fields, Figure 4c. 9,81,82 Equilibrium fluctuations and the evolution of local variations under nonequilibrium conditions are equally important and can be probed with coherent beams. 83,84 A dramatic expansion in the range of dynamic phenomena that can be probed with scattering probes looms in the near future.…”

Section: Frontiers In the Dynamics Of Materialsmentioning

confidence: 99%

Advances in Scattering Probes for Materials

Evans¹,

Billinge²

2010

MRS Bull.

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Recent advances in x-ray and neutron sources, optics, and scattering methods are heralding a new age in the study of the structure and properties of complex materials. By providing unprecedented resolution in real space, reciprocal space, and time, new techniques address materials characterization challenges beyond anything possible before, at length scales ranging from the atomic scale to the mesoscale, and at times as short as femtoseconds. The high degree of coherence of third-generation synchrotron sources permits a new level of precision in the quantitative description and analysis of diffraction and scattering and allows beams with sizes probing individual nanostructures to be produced. As a result, in situx-ray and neutron analysis techniques now provide insight into the structure of nanomaterials and yield a more precise set of metrics describing the nanometer-scale structure of materials. Time resolution and in situ studies allow application of these techniques to materials driven far from equilibrium and to the challenging environment associated with materials processing.

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“…To shed light on this phenomenon we have (i) studied non-thermal excitation pathways, such as laser excitation, and (ii) used a microscopic probe, as X-ray scattering, in order to resolve the atomic scale dynamics [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Lattice Dynamics of Laser Excited Ferroelectric BaTiO₃

Issenmann¹,

Schleef²,

Ibrahimkutty³

et al. 2012

Acta Phys. Pol. A

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We investigated the lattice dynamics of the prototypic ferroelectric barium titanate close to its ferroelectric--paraelectric phase transition aiming at a better understanding of the atomistic nature of the transition. The usage of time-resolved X-ray techniques allows to disentangle lattice motion and unit cell changes, which, in part, relate to the ferroelectric polarization. In the quasi-static case both the electrical and the laser excitation show a mean-field, simple thermal behaviour, while for time scales shorter than nanoseconds the impulsive nature of the excitation becomes visible.

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Acoustically driven ferroelastic domain switching observed by time-resolved x-ray diffraction

Cited by 5 publications

References 32 publications

The time-resolved hard X-ray diffraction endstation KMC-3 XPP at BESSY II

The time-resolved hard X-ray diffraction endstation KMC-3 XPP at BESSY II

Advances in Scattering Probes for Materials

Lattice Dynamics of Laser Excited Ferroelectric BaTiO₃

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Acoustically driven ferroelastic domain switching observed by time-resolved x-ray diffraction

Cited by 5 publications

References 32 publications

The time-resolved hard X-ray diffraction endstation KMC-3 XPP at BESSY II

The time-resolved hard X-ray diffraction endstation KMC-3 XPP at BESSY II

Advances in Scattering Probes for Materials

Lattice Dynamics of Laser Excited Ferroelectric BaTiO3

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Product

Resources

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Lattice Dynamics of Laser Excited Ferroelectric BaTiO₃