Source: http://www.ims.demokritos.gr/ims_persprofile.php?person=18&lang=en
Timestamp: 2019-04-22 22:47:00+00:00

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Institute of Materials Science (IMS) National Center for Scientific Research "Demokritos", 153-10 Aghia Paraskevi Attiki GREECE.
Ph.D. from the National Technical University of Athens in Physics (Superconductivity). Degree of Metallurgy Engineer from National Technical University of Athens (Graduated first in class).
Director of Research (2005)-, Senior Researcher (1998-2004) IMS, Assistant Researcher (1995-1997), Visiting Researcher at Centre de Recherches sur les Tres Basses Temperatures, CNRS, Grenoble France (1-7-96 - 31-7-97). Research Associate (1993-1995) IMS.
My research focuses on the study of superconductors and magnets. I study important current problems in material physics, with emphasis on complex oxides. The materials of interest are transition metal perovskite based oxides like La1-xCaxMnO3 (0<1). The problems of interest are high-temperature superconductivity, the mixed valence problem, magneto-resistive materials, metal-insulator transitions the charge ordering phenomenon and electronic phase separation. We investigate the above systems using global and local magnetic measurements, x-ray and neutron diffraction data, Moessbaur, NMR and EPR spectroscopes In addition, I am interested in vortex dynamics and vortex matter phase diagram. The materials we investigate are mostly the High-T c superconductors MgB2 and iron pnictides. Electrical and magnetic properties of the superconductors are studied using several experimental techniques including local magnetization and susceptibility measurements using microscopic Hall sensors, transport studies, and SQUID magneto-meter measurements.
Award from the Technical Chamber of Greece 1982-1983, Scholarship from State Scholarship Foundation 1983-1984, Scholarship from State Scholarship Foundation 1984-1985, Scholarship from State Scholarship Foundation 1985-1986, Medal "G. Papastamatiou" from Board of Directors of IGME since graduated first from the department of Metallurgy Engineer of the National Technical University of Athens., Fellowship from Greek Atomic Energy Commission (1987-1991), Award in VI Hellenic Conference on Solid State Physics.
I lecture since 2006 classical electromagnetism at post-graduate level (National Technical University of Athens/Institute of Material Science and Institute of Nuclear Physics NCSR Demokritos). I have supervised 5 students for their Diploma dissertation, 3 students for MPhil thesis and 4 students for PhD thesis.
Leading edge superconductivity research developments (ISBN 978-160456-017-6), Chapter 1 Exchange biased and plain superconducting –ferromagnetic layered hybrids and their possible applications, D. Stamopoulos, E. Manios and M. Pissas.
Exchange biased and plain superconducting ferromag-netic layered hybrids (ISBN-978-1-60692-643-7) D. Stamopoulos, E. Manios and M. Pissas.
Magnesium Diboride MgB2 superconductor research (ISBN-978-1-60456-566-9) Chapter 3 Surveying the vortex matter phase diagram for pristine MgB2 and atomic substituted Mg1-xAlxbB2 and MgB2-xCx single crystals. D. Stamopoulos and M. Pissas.
1. Mossbauer study of La0.75Ca0.25Mn0.98Fe0.02O3 compound. M. Pissas, G. Kallias, E. Delvin, A. Simopoulos, and D. Niarchos. J. App. Phys. 8 (1997) 5770.
2. A 139La NMR investigation of spin ordering in La0.5Ca0.5MnO3 .G. Papavassiliou, M. Fardis, F. Milia, A. Simopoulos, G. Kallias, M. Pissas, D. Niarchos, N. Ioannidis, C. Dimitropoulos and J. Dolinsek, Phys. Rev. B 55 (1997) 15000.
3. Resistivity investigations of plastic vortex creep in YBa2Cu3O6.95 crystals, A. V. Bondarenko, V. A. Shklovskij, M. A. Obolenskij, R. V. Vovk, A.A. Prodan, M. Pissas, D. Niarchos, and G. Kallias, Phys. Rev. B 58 (1998) 2445.
4. ?rreversibility line in single-crystal HgBa2CuO4+d superconductor, M. Pissas, E. Moraitakis, G. Kallias, A. Terzis, D. Niarchos, M. Charalambous.Phys. Rev. B 58 (1998) 9536.
5. NMR in Manganese Perovskites:Detection of Spatially Varying Electron States in Domain Walls. .G. Papavassiliou, M. Fardis, F. Milia, M. Pissas, G. Kallias, , D. Niarchos, C. Dimitropoulos and J. Dolinsek, Phys. Rev. B 58 (1998) 12237.
6. Structural and magnetic properties of La2/3(BaxCa1-x)1/3MnO3 perovskites. N. Moutis, I. Panagiotopoulos, M. Pissas, D. Niarchos, Phys. Rev. B 59 (1999) 1129.
7. Study of Fe-doped La2/3Ca1/3MnO3 (x=1/3) using Mossbauer spectroscopy and neutron diffraction. A. Simopoulos, M. Pissas, G. Kallias, E. Delvin, N. Moutis, I. Panagiotopoulos, D. Niarchos, C. Christides and R. Sonntag, Phys. Rev. B 59 (1999) 1263.
8. ?össbauer study of 57Fe doped La0.5Ca0.5MnO3 compound. G. Kallias, M. Pissas, E. Delvin, A. Simopoulos, D. Niarchos, Phys. Rev. B 59 (1999) 1272.
9. Polarons and Phase Separation in Lanthanum based manganese Perovskites. A 139La and 55Mn NMR Study. G. Papavassiliou, M. Fardis, M. Belesi, M. Pissas, I. Panagiotopoulos, G. Kallias and D. Niarchos, C. Dimitropoulos and J. Dolinsek., Phys. Rev. B. 59, (1999) 6390.
10. Magnetic relaxation measurements in the region of second magnetization peak in HgBa2CuO4+d single crystal. M. Pissas, D. Stamopoulos, E. Moraitakis, G. Kallias, D. Niarchos, M. Charalambous, Phys. Rev. B, 59 (1999) 12121.
11. Exchange biasing mechanism in in La2/3Ca1/3MnO3 / La1/3Ca2/3MnO3 multilayers. I. Panagiotopoulos, C. Christides, M. Pissas, D. Niarchos, Phys. Rev. B 60 (1999) 485.
12. 55Mn NMR investigation of electronic phase separaton in La1-xCaxMnO3 for 0.25£x£0.5, G. Papavassiliou, M. Fardis, M. Belesi, T. Maris, G. Kallias, M. Pissas and D. Niarchos, Phys. Rev. Lett 84, 761 (2000).
13. The onset of the fishtail peak in an untwinned ?Ba2Cu3O7-? crystal. M. Pissas, E. Moraitakis, G. Kallias, A. Bondarenko, Phys. Rev. B 62 (2000) 1446.
14. Phase separation in La0.5Ca0.5MnO3 doped with 1% 119Sn detected by Moessbauer spectroscopy. A. Simopoulos, G. Kallias, E. Devlin, M. Pissas. Phys. Rev. B. 63 054403 (2001).
15. NMR as a local probe of magnetic anisotropy: The possibility of orbital ordering and orbital liquid states in colossal magnetoresistance manganites. M. Belesi, G. Papavassiliou, M. Fardis, M. Pissas, J. E. Wegrowe, and C. Dimitropoulos. Phys. Rev. B. 63 180406(R) (2001).
16. Raman spectroscopy of the charge- and orbital-ordered state in La0.5Ca0.5MnO3 . M.V. Abrashev, J. Bäckström, L. Börjesson, M. Pissas, N. Kolev, M.N Iliev. Phys. Rev. B 64 144429 (2001).
17. Evidence for geometrical barriers in an untwined YBa2Cu3O7-? single crystal, M. Pissas, D. Stamopoulos, Phys. Rev. B. 64 134510 (2001).
18. Crystal and magnetic structure of the La1-xCaxMnO3 compound (x=0.8, 0.85) M. Pissas, G. Kallias, M. Hofmann and D. M. Toebbens, Phys. Rev. B 65, 064413 (2002).
19. Moessbauer study of 57Fe doped La1-xCaxMnO3 (x=0.5, 0.6)}, G. Kallias, M.Pissas, E. Devlin and A. Simopoulos , Phys. Rev. B, 65, 144426 (2002).
20. 11B NMR detection of the magnetic field distribution in the mixed superconducting state of MgB2. G. Papavassiliou, M. Pissas, M. Fardis, M. Karayanni, C. Christides, Phys. Rev. B 65, 012510 (2002).
21. Hysteretic behavior of the vortex lattice at the onset of the second peak for HgBa2CuO4+? superconductor, D. Stamopoulos, M. Pissas, Phys. Rev. B 65. 134524 (2002).
22. Magnetization and 11B NMR study of Mg1-xAlxB2 superconductors, M. Pissas, G. Papavassiliou, M. Karayanni, M. Fardis, I. Maurin, I. Margiolaki, K. Prassides, C. Christides, Phys. Rev. B 65, 184514 (2002).
23. Electron spin resonance and microwave absorption study of MgB2, V. Likodimos, M. Pissas, Phys. Rev. B 65 172507 (2002).
24. Crystal Structure of the Mg1-xAlxB2 superconductors near x» 0.5, Serena Margadonna, Kosmas Prassides, Ioannis Arvanitidis, Michael Pissas, Georgios Papavassiliou, and Andrew N. Fitch, Phys. Rev. B 66 014518 (2002).
25. Peak effect in single crystal MgB2 superconductor for H½½ c-axis, M. Pissas, S. Lee, A. Yamamoto, and S. Tajima, Phys. Rev. Lett. 89, 097002 (2002).
26. 3DXY variation of the vortex melting line in untwinned YBa2Cu3O6.95 single crystal in the critical fluctuation regime. M. Pissas, R. Liang. Phys. Rev. B 66 100503(R) (2002).
27. 11B and 27Al NMR spin-lattice relaxation and Knight shift study of Mg1-xAlxB2. Evidence for anisotropic Fermi surface, G. Papavassiliou, M. Pissas, M. Karayanni, M. Fardis, S. Koutandos, and K. Prassides, Phys. Rev. B 66, 140514(R) (2002).
28. Possible reordering of vortex matter near the end point of the second peak line in YBa2Cu3O7-? compound, D. Stamopoulos and M. Pissas, A. Bondarenko, Phys. Rev. B 66, 214521 (2002).
29. Conduction electron spin resonance in Mg1-xAlxB2, V. Likodimos, S. Koutandos,M. Pissas, G. Papavassiliou K. Prassides, Europhysics Letters, 61 116 (2003).
30. Phase diagram of the La1-xCaxMnO3 compound for 0.5< x< 0.9, M. Pissas and G. Kallias, Phys. Rev. B, 68, 134414 (2003).
31. Orbital domain state and finite size scaling in ferromagnetic insulating manganites, G. Papavassiliou, M. Pissas, M. Belesi, M. Fardis, J. Dolinsek, C. Dimitropoulos, J. P. Ansermet, Phys. Rev. Lett. 91, 147205 (2003).
32. A new method for the estimation of Hc2 anisotropy in polycrystalline MgB2 samples. M. Pissas, D. Stamopoulos, S. Koutantos, Journal of Superconductivity: Incorporating Novel Magnetism, 17, 259 (2004).
33. Influence of randomly distributed magnetic nanoparticles on surface superconductivity in Nb films, D. Stamopoulos, M. Pissas, V. Karanasos, D. Niarchos, I. Panagiotopoulos, Phys. Rev. B 70, 054512 (2004).
34. Influence of carbon doping on the vortex matter properties of MgB2, M. Pissas, D. Stamopoulos, S. Lee and S. Tajima, Phys Rev. 70, 134503 (2004).
35. Pronounced Tc enhancement and magnetic memory effects in hybrid films D. Stamopoulos, E. Manios, M. Pissas and D. Niarchos Supercond. Sci. Technol. 17 L51 (2004).
36. Phase diagram and magnetic properties of La1_xCaxMnO3 for 0<x<0.23, M. Pissas, G. Papavassiliou, J. Phys. Cond. Matter 16 6527 (2004).
37. Moessbauer study of 1%Fe doped LaMnO3 compound, M. Pissas and A. Simopoulos J. Phys.: Cond. Matter 16, 7419 (2004).
38. Ferromagnetic-superconducting hybrid films and possible applications: a direct study in a model combinatorial film, D. Stamopoulos, M. Pissas, and E. Manios, Phys. Rev. B 71, 014522 (2005).
39. Crystal and magnetic structure of La1-xCaxMnO3 compound (0.11≤x≤0.175), M. Pissas, I. Margiolaki, G. Papavasiliou, D. Stamopoulos, D. Argyriou, Phys. Rev. B 72, 064425 (2005).
40. Crystal and magnetic structural study of the La1-xCaxMnO3 (x=3/4) composition, M. Pissas, I. Margiolaki, K. Prassides. E. Suard, Phys. Rev. B 72, 064426 (2005).
41. ?agnetic heterogeneity in electron doped La1−xCaxMnO3 manganites studied by means of electron spin resonance, V Likodimos, M Pissas, J. Phys.: Condens. Matter 17 3903, (2005).
42. 11NMR study of pure and lightly carbon doped MgB2 superconductors M. Karayanni, G. Papavassiliou, M. Pissas, and M. Fardis, K. Papagelis and K. Prassides T. Takenobu and Y. Iwasa, Journal of Superconductivity: Incorporating Novel Magnetism, 18, 521 (2005).
43. ?oessbauer study of 1% 57Fe doped ferromagnetic insulator La0.825Ca0.175MnO3 M. Pissas, G. Papavassiliou, E. Devlin, A. Simopoulos, V. Likodimos Eur. Phys. J. B 47, 221–229 (2005).
44. Effective ferromagnetic coupling between a superconductor and a ferromagnet in La-Ca-Mn-O/Nb hybrids, D. Stamopoulos, N. Moutis, M. Pissas, D. Niarchos, Phy. Rev. B 72, 212514 (2005).
45. Low temperature charge and orbital textures in La0.875Sr0.125MnO3, G. Papavassiliou, M. Pissas, G. Diamantopoulos, M. Belesi, M. Fardis, D. Stamopoulos, A. Kontos, M. Hennion, J. Dolinsek, J-Ph. Ansermet, and C. Dimitropoulos, Phys. Rev. Lett. 96 (2006) 097201.
46. Manipulating superconductivity through the domain structure of a ferromagnet:Experimental aspects and theoretical implications, D. Stamopoulos and M. Pissas, Phys. Rev B, B 73, 132502 (2006).
48. Magnetic anisotropy in the ferromagnetic insulating state of La1-xCaxMnO3, V. Likodimos, M. Pissas Phys. Rev. B 73, 214417 (2006).
49. Enhancement of superconductivity by exchange bias, D. Stamopoulos, E. Manios, and M. Pissas, Phys. Rev. B75, 014501 (2007).
50. |Stray-fields-based magnetoresistance mechanism in Ni80Fe20-Nb-Ni80Fe20 trilayered hybrids, D. Stamopoulos, E. Manios, and M. Pissas, Phys. Rev. B 75, 184504 (2007).
51. Influence of aluminum substitution on the vortex matter properties of MgB2 by M. Pissas, D. Stamopoulos, N. Zhigadlo, J. Karpinski, Phys. Rev. B 75, 184533 (2007).
52. Phase coexistence and magnetic anisotropy in La1-xCaxMnO3 (0<x£ 0.23) studied via electron spin resonance V. Likodimos and M. Pissas, Phys. Rev. B, 76, 024422 (2007).
53. Magnetic properties of the magnetoelectric Al2−xFexO3 (x = 0.8, 0.9 and 1), M Pissas, D Stamopoulos, Y Sanakis and A Simopoulos, J. Phys.: Condens. Matter 20 (2008) 415222.
54. A Moessbauer study of the superconducting NdFeAsO0.82F0.18 oxypnictide compound, M Pissas, Y Sanakis, V Psycharis, A Simopoulos, E Devlin, Zhi-An Ren, Xiao-Li Shen, Guang-Can Che and Zhong-Xian Zhao, Supercond. Sci. Technol. 21 (2008) 115015.
55. Slow Magnetic Relaxation of a Ferromagnetic NiII5 Cluster with an S = 5 Ground State, A. Boudalis, M. Pissas, B. Abarca, V. Psycharis, C. Raptopoulou, Inorg. Chem., 47 10674-10681 (2008).
56. Bare and Protein-Conjugated Fe3O4 Ferromagnetic Nanoparticles for Utilization in Magnetically Assisted Haemodialysis: Biocompatibility with Human Blood Cells, D. Stamopoulos E. Manios, V. Gogola, D. Benaki, P. Bouziotis, M. Pissas, and D. Niarchos, Nanotechnology 19 505101 (2008).
57. Magnetic measurements of superconducting NdFeAsO0.82F0.18 oxypnictide, M. Pissas, D. Stamopoulos, Zhi-An Ren, Xiao-Li Shen, Jie Yang, Zhong and Xian Zhao, Supercond. Sci. Technol. . SUPERCONDUCTOR SCIENCE & TECHNOLOGY 22, 055008 (2009).
59. A metamagnetic 2D copper(II)-azide complex with 1D ferromagnetism and a hysteretic spin-flop transitions, Lazari, G., Stamatatos, T.C., Raptopoulou, C.P., Psycharis, V., Pissas, M., Perlepes, S.P., Boudalis, A.K, DALTON TRANSACTIONS 17 (2009) 3215-3221.
60. Direct NMR Evidence of Phase Solitons in the Spin Ground State of Overdoped Manganites D. Koumoulis, N. Panopoulos, A. Reyes, M. Fardis, M. Pissas, A. Douvalis, T. Bakas, D. N. Argyriou, and G. Papavassiliou, Phys. Rev. Lett. 104, 077204 (2010).
61. Spin relaxation in a ferromagnetically coupled triangular Cu3 complex, Yiannis Sanakis, Michael Pissas, J. Krzystek, Joshua Telser and Raphael G. Raptis, Chemical Physics Letters 493 (2010) 185–190.
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