Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Chimata, Raghuveer"'
Autor:
Jana, Somnath, Malik, R. S., Kvashnin, Yaroslav O., Locht, Inka L. M., Knut, R., Stefanuik, R., Di Marco, Igor, Yaresko, A. N., Ahlberg, Martina, Chimata, Raghuveer, Battiato, Marco, Söderström, Johan, Eriksson, Olle, Karis, Olof
Publikováno v:
Phys. Rev. Research 2, 013180 (2020)
The magneto-optical response of Fe and Ni during ultrafast demagnetization is studied experimentally and theoretically. We have performed pump-probe experiments in the transverse magneto-optical Kerr effect (T-MOKE) geometry using photon energies tha
Externí odkaz:
http://arxiv.org/abs/1908.02872
Publikováno v:
Phys. Rev. Materials 3, 075005 (2019)
Cubic hafnia (HfO$_2$) is of great interest for a number of applications in electronics because of its high dielectric constant. However, common defects in such applications degrade the properties of hafina. We have investigated the electronic proper
Externí odkaz:
http://arxiv.org/abs/1904.06445
Autor:
Chimata, Raghuveer
In recent years, there has been an intense interest in understanding the microscopic mechanism of laser induced ultrafast magnetization dynamics in picosecond time scales. Magnetization switching on such a time scale has potential to be a significant
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-308329
Autor:
Jana, Somnath, Knut, Ronny, Delczeg-Czirjak, Erna K., Malik, Rameez S., Stefanuik, Robert, Chimata, Raghuveer, Phuyal, Dibya, Mutta, Venkata, Akansel, Serkan, Primetzhofer, Daniel, Ahlberg, Martina, Söderström, Johan, Åkerman, Johan, Svedlindh, Peter, Eriksson, Olle, Karis, Olof
Element specific ultrafast demagnetization was studied in Fe$_{1-x}$Ni$_{x}$ alloys, covering the concentration range between $0.1
Externí odkaz:
http://arxiv.org/abs/1810.11001
Autor:
Chimata, Raghuveer
In this project work, we performed ab-inito calculations for 20 different non-magnetic materials (band gap ranging between 0.5 eV to 13 eV ) and three different magnetic materials such as NiO, EuO and GdN using density functional theory (DFT). Genera
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-132195
In this paper, we present a theoretical formulation of magnetization dynamics in disordered binary alloys based on Kubo linear response theory interfaced with the combination of seamlessly three approaches; density functional based tight-binding line
Externí odkaz:
http://arxiv.org/abs/1510.05200
Autor:
Chimata, Raghuveer, Isaeva, Leyla, Kadas, Krisztina, Bergman, Anders, Sanyal, Biplab, Mentink, Johan H., Katsnelson, Mikhail I., Rasing, Theo, Kirilyuk, Andrei, Kimel, Alexey, Eriksson, Olle, Pereiro, Manuel
Publikováno v:
Phys. Rev. B 92, 094411 (2015)
In recent years, there has been an intense interest in understanding the microscopic mechanism of thermally induced magnetization switching driven by a femtosecond laser pulse. Most of the effort has been dedicated to periodic crystalline structures
Externí odkaz:
http://arxiv.org/abs/1508.05972
In this letter, we provide a microscopic model for the ultrafast remagnetization of atomic moments already quenched above Stoner-Curie temperature by a strong laser fluence. Combining first principles density functional theory, atomistic spin dynamic
Externí odkaz:
http://arxiv.org/abs/1210.2616