RNDr. Ladislav Havela, CSc.

Office 16, First floor, Ke Karlovu 5 Tel. (02) 2191 1351, (02) 2191 1379 Fax (02) 2191 1351, (02) 2491 1061 E-mail havela@apollo.karlov.mff.cuni.cz Homepage http://195.113.32.128

• Senior research fellow at the Department of Electronic Structures, Faculty of Mathematics and Physics, Charles University
• graduated at Charles University (solid state physics) 1979, PhD 1987, co-author of nearly 200 scientific papers mostly on actinide intermetallics, Alexander von Humboldt Fellow (1991-92), visiting scientist of the European Communities (1988,1993), in the period 1991-92 also at the University of Amsterdam. Co-author of monographs "Intermetallic Compounds of Actinides" and "Magnetism of Ternary intermetallic Compounds of Uranium" for the Handbook on Magnetic Materials, Elsevier Science Publishers, Amsterdam 1988 and 1998.
• Regularly takes part in major conferences and other international meetings, invited speaker at Actinides 93 in Santa Fe, the 5th European Magnetic Materials and Applications Conference (EMMA `93), International Conference of Strongly Correlated Systems 95 in Goa, India, LT21, Prague 1996, International Conference on f-electron Systems, Paris 1997, International Workshop on Orbital and Spin magnetism of Actinides, Daresbury 1999, and Spring Meeting of the German Physical Society, Regensburg 2000.
• Member of the Czech Union of Mathematics and Physics
• Awarded by a bronze medal of the Union of Czechoslovak Mathematicians and Physicists "For his work in the field of magnetism of uranium compounds contributing substantially to understanding of their properties, including the giant magnetoresistance phenomenon in UNiGa" (1996).
  Received the "Outstanding Poster Prize" at the International Conference on Strongly Correlated Systems, Nagano 1999, for the contribution on the Non-Fermi liquid behaviour of UCoAl.

Fields of interest

strongly correlated electron systems, magnetism and transport in actinide intermetallics, physics of hydrides,

photoelectron spectroscopy.

Short list of essential publications.

1. V. Sechovsky, L. Havela: Intermetallic Compounds of Actinides in: Ferromagnetic Materials - A Handbook on the Properties of Magnetically ordered Substances, E.P. Wohlfarth and K.H.J.Buschow, eds., North-Holland, Amsterdam 1988,vol.4, pp.309-491
2. L. Havela, V. Sechovsky, L. Jirman, F.R. de Boer, E. Bruck: Magnetic Transitions in UNiGa J.Appl.Phys. 69 (1991) 4813
3. L. Havela, T. Almeida, J.R. Naegele, V. Sechovsky and E. Bruck: High-Resolution Photoemission on UPdSn and UNiAl J.Alloys Comp. 181 (1992) 205
4. L. Havela, V. Sechovsky, J.R. Naegele, T. Almeida, E.H. Bruck, H. Nakotte and F.R. de Boer: 5f Electron Localization in UTX Compounds J.Magn.Magn.Mater. 104-107 (1992) 23
5. F.R. de Boer, E. Bruck, H. Nakotte, A.V. Andreev, V. Sechovsky, L. Havela, P. Nozar, C.J.M. Denissen, K.H.J. Buschow, B. Vaziri, P. Meissner, H. Maletta and P. Rogl: Magnetic, Electrical and Specific-Heat Properties of UPdSn and UAuSn Physica B 176 (1992) 275
6. L. Havela, V. Sechovsky, F.R. de Boer, E. Bruck and H. Nakotte: Magnetic Anisotropy in UTX Compounds Physica B 177 (1992) 159
7. M.N. Peron, Y. Kergadallan, J. Rebizant, D. Meyer, S. Zwirner, L. Havela, H. Nakotte, J.C. Spirlet, G.M. Kalvius, E. Colineau, J.L. Oddou, C. Jeandey, J.P. Sanchez, and J.M. Winand: A New Family of Actinide Ternary Intermetallic Compounds J.Alloys & Comp. 201 (1993) 203
8. L. Havela, V. Sechovsky, K. Prokes, H. Nakotte, E. Bruck, and F.R. de Boer: Magnetoresistance in Actinide and Lanthanide Intermetallics J.Alloys & Comp. 207/208 (1994) 249
9. L. Havela, V. Sechovsky, H. Nakotte, E. Bruck, F.R. de Boer: Anisotropy of Magnetic and Transport Properties in Actinide Intermetallics IEEE Trans.Magn. 30 (1994) 1130-1135
10. E. Bruck, H. Nakotte, F.R. de Boer,P.F. de Châtel, H.P. van der Meulen, J.J.M. Franse, A.A. Menovsky, N.H. Kim-Ngan, L. Havela, V. Sechovsky, J.A.A.J. Perenboom, N.C. Tuan, J. Sebek: Electronic Properties of UNiAl in High Magnetic Fields Phys.Rev. B 49 (1994) 8852
11. L. Havela, V. Sechovsky, H. Nakotte, E. Bruck, F.R. de Boer: Magnetic Anisotropy and Transport Properties of Actinide Intermetallics J.Alloys & Comp. 213/214 (1994) 243-247
12. L. Havela, V. Sechovsky, P. Svoboda, M. Divis, H. Nakotte, K. Prokes, F.R. de Boer, A. Purwanto, R.A. Robinson, A. Seret, J.M. Winand, J. Rebizant, J.C. Spirlet, M. Richter, H. Eschrig: Heavy-Fermion Behaviour of U₂T₂X Compounds J.Appl.Phys. 76 (1994) 6214-6216
13. V. Sechovsky and L. Havela: Heavy Fermion Behaviour in Lanthanide and Actinide Intermetallics J.Alloys & Comp. 225 (1995) 444-455
14. A.V. Andreev, L. Havela, V. Sechovsky, R. Kuzel, H. Nakotte, K.H.J. Buschow, J.H.V.J. Brabers, F.R. de Boer, E. Bruck, M. Blomberg, and M. Merisalo: Magnetic Properties of Non-stoichiometric UNiGa J.Alloys & Comp. 224 (1995) 244-248
15. A. Purwanto, V. Sechovsky, L. Havela, R.A. Robinson, H. Nakotte, Allen C. Larson, K. Prokes, E. Bruck, and F.R. de Boer: Low-Temperature Magnetic Structure of UNiGe Phys.Rev.B 53 (1996) 758-765
16. H. Nakotte, A. Purwanto, R.A. Robinson, K. Prokes, F.R. de Boer, L. Havela, V. Sechovsky, and I. Swainson: Electronic Properties of UCuSn J.Appl.Phys. 79 (1996) 6408-6410
17. H. Nakotte, A. Purwanto, R.A. Robinson, L. Havela, V. Sechovsky, L.J.C. Pereira, A. Seret, J. Rebizant, J.C. Spirlet, and F. Trouw: Hybridization Effects in U₂T₂X Compounds: Magnetic Structures of U₂Rh₂Sn and U₂Ni₂In, Phys.Rev.B53 (1996) 3263
18. L. Havela, V. Sechovsky, K. Prokes, H. Nakotte, H. Fujii, and A. Lacerda: Giant Magnetoresistance Effects in 5f-Materials Physica B223-224 (1996) 245-250
19. H. Nakotte, A. Purwanto, R.A. Robinson, Z. Tun, K. Prokes , Allen C. Larson, L. Havela, V. Sechovsky, H. Maletta, E. Bruck and F.R.de Boer: Commensurate and incommensurate magnetic structures of UniGe, Phys.Rev. B 54 (1996) 7201
20. Y. Aoki, Y. Kobayshi, H. Sato, H. Sugawara, V. Sechovsky, L. Havela, K. Prokes, M. Mihalik, and A. Menovsky: Superzone Gap Formation Evidenced by Specific Heat in UNiGa, J.Phys.Soc.Japan 65 (1996) 3312-3316
21. Y. Kobayashi, Y. Aoki, H. Sugawara, H. Sato, V. Sechovsky, L. Havela, K. Prokes, M. Mihalik, and A. Menovsky: Hall effect and thermoelectric power in UNiGa, Phys.Rev.B 54 (1996) 15330-15334
22. L. Havela, A.V. Andreev, V. Sechovsky, I.K. Kozlovskaya, K. Prokes, P. Javorsky, M.I. Bartashevich,
    T. Goto, and K. Kamishima:5f-band metamagnetism in UCoAl
    Physica B 230-232 (1997) 98
23. A.V. Kolomiets, L. Havela, V. Sechovsky, L.E. DeLong, D.B. Watkins, A.V. Andreev:
    Evidence for an extended critical region near metamagnetic transition of UCoAl
    J.App.Phys. 83 (1998) 6435
24. A.V. Kolomiets, L. Havela, V. Sechovsky, L.E. DeLong, D.B. Watkins, A.V. Andreev:
    Non-Fermi-liquid behaviour of UCoAl, Physica B 259-261 (1999) 415
25. V. Sechovsky, L. Havela:
    Magnetism of Ternary Intermetallic Compounds of Uranium
    in: Hanbook of Magnetic materials, K.H.J.Buschow, ed., North-Holland, Amsterdam 1998,vol.11, pp.1-289
26. P. Javorsky, L. Havela, F. Wastin, J.C. Griveau, E. Bednarczyk, J. Rebizant, J.P. Sanchez, P. Vulliet:
    Magnetic and transport properties of NpNiSn
    J. Alloys Comp. 283 (1999) 16-20
27. A.V. Kolomiets, L. Havela, V. Sechovsky, A.V. Andreev, V.A. Yartys, I.R. Harris:
    Structural and magnetic properties of equiatomic rare-earth ternaries
    Int.J.Hydrogen Energy 24 (1999) 119-127