The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
C. P. Hauri - One of the best experts on this subject based on the ideXlab platform.
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Simultaneous electronic and Magnetic Excitation of cobalt by intense THz pulses
2016 Conference on Lasers and Electro-Optics (CLEO), 2016Co-Authors: M. Shalaby, C. Vicario, C. P. HauriAbstract:We study the interaction of intense THz Magnetic fields with ferroMagnetic thin films. At higher field intensities, the THz electric field starts playing a role, strongly changing the dielectric properties of the cobalt thin film.
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simultaneous electronic and the Magnetic Excitation of a ferromagnet by intense thz pulses
New Journal of Physics, 2016Co-Authors: M. Shalaby, C. Vicario, C. P. HauriAbstract:The speed of magnetization reversal is a key feature in Magnetic data storage. Magnetic fields from intense THz pulses have been recently shown to induce small magnetization dynamics in a cobalt thin film on the sub-picosecond time scale. Here, we show that at higher field intensities, the THz electric field starts playing a role, strongly changing the dielectric properties of the cobalt thin film. Both the electronic and Magnetic responses are found to occur simultaneously, with the electric field response persistent on a time scale orders of magnitude longer than the THz stimulus.
M. Shalaby - One of the best experts on this subject based on the ideXlab platform.
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Simultaneous electronic and Magnetic Excitation of cobalt by intense THz pulses
2016 Conference on Lasers and Electro-Optics (CLEO), 2016Co-Authors: M. Shalaby, C. Vicario, C. P. HauriAbstract:We study the interaction of intense THz Magnetic fields with ferroMagnetic thin films. At higher field intensities, the THz electric field starts playing a role, strongly changing the dielectric properties of the cobalt thin film.
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simultaneous electronic and the Magnetic Excitation of a ferromagnet by intense thz pulses
New Journal of Physics, 2016Co-Authors: M. Shalaby, C. Vicario, C. P. HauriAbstract:The speed of magnetization reversal is a key feature in Magnetic data storage. Magnetic fields from intense THz pulses have been recently shown to induce small magnetization dynamics in a cobalt thin film on the sub-picosecond time scale. Here, we show that at higher field intensities, the THz electric field starts playing a role, strongly changing the dielectric properties of the cobalt thin film. Both the electronic and Magnetic responses are found to occur simultaneously, with the electric field response persistent on a time scale orders of magnitude longer than the THz stimulus.
C. Vicario - One of the best experts on this subject based on the ideXlab platform.
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Simultaneous electronic and Magnetic Excitation of cobalt by intense THz pulses
2016 Conference on Lasers and Electro-Optics (CLEO), 2016Co-Authors: M. Shalaby, C. Vicario, C. P. HauriAbstract:We study the interaction of intense THz Magnetic fields with ferroMagnetic thin films. At higher field intensities, the THz electric field starts playing a role, strongly changing the dielectric properties of the cobalt thin film.
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simultaneous electronic and the Magnetic Excitation of a ferromagnet by intense thz pulses
New Journal of Physics, 2016Co-Authors: M. Shalaby, C. Vicario, C. P. HauriAbstract:The speed of magnetization reversal is a key feature in Magnetic data storage. Magnetic fields from intense THz pulses have been recently shown to induce small magnetization dynamics in a cobalt thin film on the sub-picosecond time scale. Here, we show that at higher field intensities, the THz electric field starts playing a role, strongly changing the dielectric properties of the cobalt thin film. Both the electronic and Magnetic responses are found to occur simultaneously, with the electric field response persistent on a time scale orders of magnitude longer than the THz stimulus.
N Barisic - One of the best experts on this subject based on the ideXlab platform.
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hidden Magnetic Excitation in the pseudogap phase of a high tc superconductor
Nature, 2010Co-Authors: Yuan Li, V Baledent, Guichuan Yu, N Barisic, K Hradil, Richard A Mole, Y SidisAbstract:The pseudogap phenomenon, a discontinuity in the energy level of a material's electronic spectrum, is a universal characteristic of the high transition temperature (Tc) copper oxides. The nature of the pseudogap has been a central question in condensed matter physics for more than a decade, but many of its properties remain unexplained. Recent studies have pointed to the universal existence of an unusual Magnetic order below T*, the temperature below which the anomalous properties associated with the pseudogap become apparent. If confirmed, this would have the profound implication that the pseudogap regime constitutes a genuine new phase of matter rather than a mere crossover phenomenon. The results of inelastic neutron scattering experiments on the superconductor HgBa2CuO4+δ (Hg1201) now reveal a fundamental collective Magnetic mode associated with the unusual order, providing further support for this picture. Recent findings indicate that the pseudogap regime in the high-transition-temperature copper oxides constitutes a new phase of matter rather than a mere crossover phenomenon. These authors report inelastic neutron scattering results for HgBa2CuO4+δ that reveal a fundamental collective Magnetic mode associated with the unusual order, further supporting this picture. The mode's intensity rises below the pseudogap characteristic temperature and its dispersion is weak. The elucidation of the pseudogap phenomenon of the high-transition-temperature (high-Tc) copper oxides—a set of anomalous physical properties below the characteristic temperature T* and above Tc—has been a major challenge in condensed matter physics for the past two decades1. Following initial indications of broken time-reversal symmetry in photoemission experiments2, recent polarized neutron diffraction work demonstrated the universal existence of an unusual Magnetic order below T* (refs 3, 4). These findings have the profound implication that the pseudogap regime constitutes a genuine new phase of matter rather than a mere crossover phenomenon. They are furthermore consistent with a particular type of order involving circulating orbital currents, and with the notion that the phase diagram is controlled by a quantum critical point5. Here we report inelastic neutron scattering results for HgBa2CuO4+δ that reveal a fundamental collective Magnetic mode associated with the unusual order, and which further support this picture. The mode’s intensity rises below the same temperature T* and its dispersion is weak, as expected for an Ising-like order parameter6. Its energy of 52–56 meV renders it a new candidate for the hitherto unexplained ubiquitous electron–boson coupling features observed in spectroscopic studies7,8,9,10.
T Egami - One of the best experts on this subject based on the ideXlab platform.
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two dimensional resonant Magnetic Excitation in bafe1 84co0 16as2
Physical Review Letters, 2009Co-Authors: M D Lumsden, A D Christianson, D Parshall, M B Stone, S E Nagler, G J Macdougall, H A Mook, K Lokshin, T EgamiAbstract:nelastic neutron scattering measurements on single crystals of superconducting BaFe1.84Co0.16As2 reveal a Magnetic Excitation located at wave vectors (1/2???1/2?? ?L) in tetragonal notation. On cooling below TC, a clear resonance peak is observed at this wave vector with an energy of 8.6(0.5) meV, corresponding to 4.5(0.3) kBTC. This is in good agreement with the canonical value of 5 kBTC observed in the cuprates. The spectrum shows strong dispersion in the tetragonal plane but very weak dispersion along the c axis, indicating that the Magnetic fluctuations are two dimensional in nature. This is in sharp contrast to the anisotropic three dimensional spin Excitations seen in the undoped parent compounds
