M. Skapas
Vilnius University
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Featured researches published by M. Skapas.
IEEE Transactions on Plasma Science | 2017
Nerija Zurauskiene; Dainius Pavilonis; Jonas Klimantavicius; Saulius Balevicius; Voitech Stankevic; Skirmantas Kersulis; V. Plausinaitiene; A. Abrutis; Rasuole Lukose; M. Skapas; Remigijus Juskenas; Birute Knasiene; Evaldas Naujalis; Joseph M. Law
The results of structure and magnetoresistance (MR) of nanostructured La<sub>1–<italic>x</italic></sub>Ca<sub><italic>x</italic></sub>Mn<sub><italic>y</italic></sub>O<sub>3</sub> (LCMO) films, grown at different gas pressure (from 3 to 7 Torr) by pulse injection metal–organic chemical vapor deposition (MOCVD) technique, are presented. The MR was investigated in pulsed magnetic fields up to 60 T in the temperature range 1.5–294 K. The results were analyzed from the perspective of using these films for magnetic field sensors operating at low temperatures. It was demonstrated that with the increase of Ar + O<sub>2</sub> gas pressure, the surface morphology of the films becomes rougher and grain size increases. Also, the ratio of Mn/(La + Ca) increases with the increase of the pressure. Large MR of the films was observed in a wide temperature range below the ferromagnetic–paramagnetic phase transition. It was shown that at cryogenic temperatures, the films grown at gas pressure of 3 Torr have higher sensitivity in lower magnetic field range (<10 T), while in high magnetic fields (20–60 T), the properties of films grown at higher gas pressure 5–7 Torr are favored. The obtained results allow evaluating the influence of MOCVD growth pressure on MR and sensitivity to the magnetic field of LCMO manganites used for pulsed magnetic field sensors.
IEEE Transactions on Plasma Science | 2017
Nerija Zurauskiene; Dainius Pavilonis; Jonas Klimantavicius; Saulius Balevicius; Voitech Stankevic; Remigijus Vasiliauskas; V. Plausinaitiene; A. Abrutis; M. Skapas; Remigijus Juskenas
The results of investigation of colossal magnetoresistance relaxation in nanostructured La-Sr(Ca)-Mn-O films upon removal of magnetic field pulse are presented. Thin films having thicknesses of 75–350 nm grown by pulsed injection metal–organic chemical vapor deposition technique were studied in pulsed magnetic fields having duration of 0.9 ms and amplitudes of 2–12 T. It was obtained that “fast” relaxation process occurring in hundred microseconds time scale exhibits anisotropy: the magnitude of remnant resistivity is approximately three times smaller and the process is faster when magnetic field is applied perpendicular to the film plane in comparison with in-plane direction. The dynamics of this relaxation process was analyzed using Kolmogorov–Avrami–Fatuzzo model, taking into account nucleation and reorientation of magnetic domains into equilibrium state. The “fast” remnant relaxation was not observed after the application of longer pulses (20 ms) having amplitude of 60 T. Influence of remnant relaxation on operation of B-scalar magnetic field sensors based on nanostructured manganite films is discussed.
Chemistry of Materials | 2008
A. Abrutis; V. Plausinaitiene; M. Skapas; C. Wiemer; O. Salicio; Agostino Pirovano; Enrico Varesi; Simon A. Rushworth; Wojciech Gawelda; J. Siegel
Microelectronic Engineering | 2008
A. Abrutis; V. Plausinaitiene; M. Skapas; C. Wiemer; O. Salicio; Massimo Longo; Agostino Pirovano; J. Siegel; Wojciech Gawelda; Simon A. Rushworth; C. Giesen
Journal of Crystal Growth | 2009
A. Abrutis; V. Plausinaitiene; M. Skapas; C. Wiemer; Wojciech Gawelda; J. Siegel; Simon A. Rushworth
Thin Solid Films | 2013
A. Abrutis; M. Lukosius; M. Skapas; S. Stanionyte; V. Kubilius; Ch. Wenger; A. Zauner
Microelectronic Engineering | 2011
M. Lukosius; C. Baristiran-Kaynak; A. Abrutis; M. Skapas; V. Kubilius; A. Zauner; Gerhard Ruhl; Ch. Wenger
Thin Solid Films | 2012
C. Baristiran Kaynak; M. Lukosius; Bernd Tillack; Ch. Wenger; A. Abrutis; M. Skapas
Journal of Cleaner Production | 2018
Maksym Tatariants; Samy Yousef; M. Skapas; Remigijus Juskenas; Vidas Makarevicius; Stasė-Irena Lukošiūtė; Gintaras Denafas
IEEE Transactions on Magnetics | 2017
Nerija Zurauskiene; Vakaris Rudokas; Saulius Balevicius; Skirmantas Kersulis; Voitech Stankevic; Remigijus Vasiliauskas; V. Plausinaitiene; Milita Vagner; Rasuole Lukose; M. Skapas; Remigijus Juskenas