Petriina
Paturi
Senior Researcher, Wihuri Physical Laboratory
Professor, Wihuri Physical Laboratory
Professor, Vice-dean of Faculty of Science
Links
Areas of expertise
superconducitivity
magnetism
flux pinning
YBCO
manganites
thin films
X-ray diffraction
magnetometry
pulsed laser deposition
Biography
I have been a professor of experimental solid state physics in the WIhuri Physical Laboratory, Department of Physics and Astronomy, University of Turku since 2012. I got my MSc in 1994 in University of Turku and continued towards PhD as a Academy of Finland research assistant. I defended my thesis on YBCO thin films and nanoparticles in 1998. After that I worked as an Academy post-doc researcher in Risø National Laboratory, Denmark and in University of Turku. In years 2003-2009 I was an Academy research fellow at University of Turku. Since 2009 I have been a professor and the director of Wihuri Physical Laboratory. During years 2012-2017 I was also the head of the Department of Physics and Astronomy. Since 2017 I have been the vice-dean of the Faculty of Science and Engineering in charge of teaching. Since beginning of 2019 I have been a member of the Research Council in Science and Wngineering in the Academy of Finland.
Teaching
During the years I have taught many courses in solid state physics, superconductivity and magnetism at BSc and MSc level. Currently I teach BSc course of statistical physics and MSc courses in structural and thermal properties of solids, magnetism and spintronics and x-ray diffraction methods. I have tried to use active teaching methods, such as flipped classroom and pre-lecture questions, in all my courses. I have full teachers qualification in university pedagogics.
Research
My research concentrates on flux pinning in YBCO thin films with artificial pinning sites and the theoretical modeling of these. We have found that the addition of columnar pinning sites into the films decreases the field dependence of the critical current density and changes the angular dependence. These changes depend on the size of the columns.
The other main topic is low bandwidth manganites. Currently we are investigating the structural, magnetic and resistive properties of (Pr,Ca)MnO3 and (Gd,Ca)MnO3 thin films. We have e.g. found that we can induce a metal-insulator-transition to the PCMO films by illumination and that the GCMO films have a charge-ordered state still at room temperaure. We have also recently shown that low bandwidth manganites can be used as resistive switching devices. These are needed in e.g. neuromorphic computers.
The other main topic is low bandwidth manganites. Currently we are investigating the structural, magnetic and resistive properties of (Pr,Ca)MnO3 and (Gd,Ca)MnO3 thin films. We have e.g. found that we can induce a metal-insulator-transition to the PCMO films by illumination and that the GCMO films have a charge-ordered state still at room temperaure. We have also recently shown that low bandwidth manganites can be used as resistive switching devices. These are needed in e.g. neuromorphic computers.
Publications
Linear and nonlinear ac susceptibilities in polycrystalline low-bandwidth Pr1-xCaxMnO3(x = 0.0 - 0.3) manganite (2014)
Journal of Physics: Condensed Matter
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))
The effect of BaCeO3 dopant concentration on magnetically defined BiTT and Bc2 in YBa2Cu 3O6+x thin films deposited on SrTiO3 substrates (2014)
Journal of Physics: Conference Series
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))
Three ranges of the angular dependence of critical current of BaZrO 3 doped YBa2Cu3O7 - δ thin films grown at different temperatures (2014)
Thin Solid Films
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))
Manufacture of Bi-cuprate thin films on MgO single crystal substrates by chemical solution deposition (2014)
Journal of Physics: Conference Series
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))
The dependence of resistively measured Bc2 and Birr on BaZrO3 concentration in YBa2Cu3O 6+x thin films (2014)
Journal of Physics: Conference Series
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))
The effect of BZO dopant concentration on magnetically obtained Birr and Bc2 in YBCO thin films deposited on STO substrates (2014)
Journal of Physics: Conference Series
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))
Magnetic and luminescent properties of chromium-doped ZnSe crystals (2014)
Solid State Sciences
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))
Peculiarities of the electrophysical properties of InSb/AlInSb/AlSb heterostructures with a high electron concentration in the two-dimensional channel (2014)
Fizika i tekhnika poluprovodnicov / Semiconductors
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))
Structural and Superconducting Properties of Laser-Deposited (110)-Oriented YBa2Cu3O7-delta Thin Films After In Situ Annealing (2013)
IEEE Transactions on Applied Superconductivity
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))
Absence of spontaneous magnetism associated with a possible time-reversal symmetry breaking state beneath the surface of (110)-oriented YBa2Cu3O7-delta superconducting films (2013)
Physical Review B
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))