Department of Metal Physics

Address

	Department of Metal Physics, Slovak Academy of Sciences, Dubravska cesta 9, SK-845 11 Bratislava, Slovakia.
	Phone: (+421.2) 5941 0561, (+421.2) 5941 0560
	Fax: (+421.2) 5477 6085
	E-mail: fyzisvec@savba.sk

Head of Department

Dr. Peter Svec

Focus of Research

Experimental and theoretical investigations of amorphous, nanocrystalline, quasicrystalline and polycrystalline alloys prepared by rapid quenching from the melt, special metastable materials with high-performance magnetic, mechanical and electrical properties.

List of Current Research Projects

National Research Projects

	Secondary Magnetic Anisotropies in Heterogeneous Soft Ferromagnets. (Project# 2/2035/24 - Principal Investigator: P. Butvin)
	Cluster Structure and Extraordinary Physical Properties of Nanocrystalline and Quasicrystalline Alloys. (Project# 2/5096/25 - Principal Investigator: P. Svec)

International Research Projects

	European Lead-Free Soldering Network (ELFNET). (6th Framework Programme - Coordination Action NMP2-CT-2003-505504 - National Coordinator: P. Svec)
	Manufacture and Characterisation of Nanostructured Al Alloys. (5th Framework Programme HPRN-CT-2000-00038 - Partner Country Project Director: P. Svec)
	Magnetoelastic Properties of Rapidly Quenched Materials and their Applications in Civil Engineering. (NATO Science for Peace No. SfP-973649 - Partner Country Project Director: P. Svec)
	Gasless Combustion and Structure Formation in Multilayer Thin Films. (INTAS Project No. 03-51-4103 - Intas Member Team Coordinator: E. Illekova)

Recent publications - 2001

B. Chenevier, O. Chaix-Pluchery, I. Maťko, R. Madar and F. La Via.
Structural investigation of the C49-C54 transformation in TiSi2 thin films.
Microelectronic Engineering 55 (2001) 115-121

	B. Chenevier, O. Chaix-Pluchery, I. Maťko, J. P. Senateur, F. La Via and R. Madar. In situ investigations of the metal/silicon reaction in Ti/Si thin films capped with TiN: volumetric analysis of the C49-C54 transformation. Applied Physics Letters 79 (2001) 13.
	P. Duhaj, P. Svec, J. Sitek and D. Janickovic. Thermodynamic, kinetic and structural aspects of the formation of nanocrystalline pheses in Fe_73.5-xNi_xCu₁Nb₃Si_13.5B₉ alloys. Materials Science and Engineering A304-306 (2001) 178-186.
	G. Flachbart, K. Gloos, E. Konovalova, M. Reiffers, P. Samuely and P. Svec. Energy gap of intermediate-valent SmB₆ studied by point-contact spectroscopy. Physical Review B64 (2001) 085104.
	A. Gupta, K. Ruwali, P. Neelima and P. Duhaj. Crystallization behavior of amorphous (Fe_100-xCo_x)₈₅B₁₅. Materials Science and Engineering A304-306 (2001) 371-374.
	E. Illeková and P. Duhaj. Direct control of medium range order in a Ni modified Finemet-type alloy. Journal of Non-Crystalline Solids 287 (2001) 167-170.
	D. Janickovic, P. Sebo, P. Duhaj and P. Svec. The rapidly quenched Ag Cu Ti ribbons for active joining of ceramics. Materials Science and Engineering A304-306 (2001) 569-573.
	Z. Kaczkowski, G. Vlasák, P. Svec, P. Duhaj, E. Milewska, A. Kryzewski and E. Davis Magnetomechanical coupling in Fe_73.5Cu₁Nb₁Ta₂Si_13.5B₉ alloy strips after annealing up to 700^�C and its dependence on magnetic field. Hydroacoustics 4 (2001) 105-108.
	M. Krajčí and J. Hafner. Fermi surfaces and electronic transport properties of quasicristalline approximants. Journal of Physics: Condensed Matter 13 (2001) 3817-3830.
	M. Krajčí and J. Hafner. Electronic structure of hexagonal Y-Zn-Mg compound and its relation to icosahedral alloy. Ferroelectrics 250 (2001) 347-350.
	M. Krajčí, J. Hafner and M. Mihalkovic. Short-range order and the electronic structure of decagonal Al-Ni-Co. Materials Science and Engineering A294-296 (2000) 548-552.
	K. Kristiaková and P. Svec. Origin of cluster and void structure in melt-quenched Fe-Co-B metallic glasses by positron annihilation at low temperatures. Physical Review B64 (2001) 014204.
	K. Kristiakoá and P. Svec. Continuous distribution of thermodynamic microprocesses in complex metastable systems. Physical Review B64 (2001) 184202.
	K. Kristiaková and P. Svec. Distribution of thermodynamic processes controlling (nano)crystalization of iron-based matallic glasses. Scripta Materialia 44 (2001) 1275-1279.
	K. Kristiaková and P. Svec. Higher order analysis of the distribution of crystallization processes in metallic glasses. Materials Science and Engineering A304-306 (2001) 343-348.
	K. Kristiaková and P. Svec. Model-independent approach to isothermal crystallization kinetics. Journal of Metastable and Nanocrystalline Materials 10 (2001) 467-474.
	K. Kristiaková, P. Svec and D. Janickovic. Short-range order and micromechanisms controlling nanocrystallization of iron-cobalt based metallic glasses. Materials Transaction JIM 42 (2001) 1523-1529.
	M. Miglierini, P. Schaaf, I. Skovránek, D. Janickovic, E. Carpene and S. Wagner. Laser-induced structural modifications of FeMoCuB metallic glasses before and after transformation into a nanocrystaline state. Journal of Physics: Condensed Matter 13 (2001) 10359-10369.
	M. Mihalkovic, H. Elhor and J. B. Suck. Atomic dynamics in Al-rich Al-Co alloys near the composition of the decagonal quasicrystal. Physical Review B63 (2001) 214301.
	P. Svec and K. Kristiaková. Crystallization of metallic glasses by continuous distribution analysis. Journal of Metastable and Nanocrystalline Materials 10 (2001) 475-480.
	G. Vlasák, P. Svec and P. Duhaj. Application of isochronal dilatation measurements for determination of viscosity of amorphous alloys. Materials Science and Engineering A304-306 (2001) 472-475.
	G. Vlasák, P. Svec, Z. Kaczkowski and P. Duhaj. Magnetostrictions and transtormations process in Fe_73.5Cu₁Ta₂Nb₁Si_13.5B₉. Materials Science and Engineering A304-306 (2001) 1039-1042.

Conference Proceedings and Books

	J. Bydzovský, M. Kollar, P. Svec, V. Jancárik and I. Vávra. Magnetoelastic strain-meter, elimination of DC magnetic filed influence. In Proc. Conf. Magnetic Measurements 2000 (CVUT, Praha, 2001) 5-8.
	M. Deanko, K. Kristiaková and P. Svec. Grain size distribution in disordered metallic system upon crystallization. In Proc. Intl. Workshop on Appl. Physics of Condensed Matter - APCOM 2001, ed. J. Mudron (Military Academy, Liptovský Mikuláš, 2001) 142-145.
	E. Illeková, J. J. Kunz, J. C. Gachon and F. A. Kuhnast. High temperature thermodynamics of the Al-based alloys. In Proc. Seminar on Thermodynamics of Materials (Masaryk University, Brno, 2001) 75-78.
	Z. Kaczkowski, G. Vlasák, P. Svec, P. Duhaj, E. Milewska, A. Krzyzewski and E. Davis. Ultrasound velocities in Fe73.5Cu1Nb1Ta2Si13.5B9 alloy strips after annealing in vaccuum above Curie temperature and their dependence on magnetic field. In Molecular and Quantum Acoustics 21 (Upper Silesian Division of the Polish Acoustical Society, Gliwice, 2001) 101-108.
	M. Kollar, J. Bydzovský, P. Svec, L. Kraus, V. Jancárik and I. Vávra. Stressed amorphous ribbons under in-plane magnetizing field. In Proc. Conf. 1 & 2 Dimensional Magnetic Field Measurement and Testing, TU Wien (Bad Gastein, 2001) 248-255.

Summary of Progress:

	Initial thermodynamic states, energetics, structures and micromechanisms active in transitions of complex metastable metallic systems to a more stable state were investigated from the viewpoint of spatially correlated distribution of rates of microprocesses controlling the transformation processes. Distributions and temperature dependencies of their activation energies were determined.
	Internal complexity of disordered systems was correlated with the short-range ordering of atoms and with the formation of (nano)crystalline phases. A novel concept of clustered structure of amorphous state was proposed and it was shown that its inclusion into the general rate theory is necessary for exact description of transition processes in these systems.
	Investigations of transport properties in model quasicrystalline aluminium-based system were successfully concluded. Unique anomalies of transport properties in aluminum-transition metal systems were discovered and correlated with the change of character of interatomic bonding and with the charge density distribution.
	Novel systems based on Ni-Mn-Ga with giant magnetic shape memory effect were prepared by rapid quenching and investigated from the viewpoint of structure transformation and its correlation with MSM effect.
	Special methods of thermal analysis were developed and applied to investigation of high-temperature thermodynamics of aluminium-based systems.
	Amorphous and nanocrystalline aluminium-based alloys with increased strength were prepared on the basis of thermodynamic predictions and their structure evolution was determined.
	A model of nanocrystallization kinetics was developed and generalized to soft magnetic alloys. Using a new device for measurement of magnetomechanical properties the evolution of important physical quantities was determined.

Other results:

Exposition, 8th International Machine Construction Fair, May 29 - June 1, 2000, Nitra

Recent publications - 2000

	P. Butvin, B. Butvinová, Z. Frait, J. Sitek and P. Svec. Magnetic response of FeNbCuBSi RQ ribbons to bi-axial strain. Journal of Magnetism and Magnetic Materials 215-216 (2000) 293-296.
	B. Butvinová, P. Butvin and V. Ocelák. Susceptibility and its disaccommodation in nanocrystalline FeNb-based materials. Journal of Magnetism and Magnetic Materials 215-216 (2000) 708-710.
	J. P. Braganti, O. Held, F. A. Kuhnast and E. Illeková. Kinetic study of isothermal crystallization in amorphous Al₃₃Ni₁₆Zr₅₁ produced by mechanical alloying. Thermochimica Acta 362 (2000) 71-78.
	M. Gaidi, J. L. Hazemann, I. Mat'ko, B. Chenevier, M. Rumyantseva, A. Gaskov and M. Labeau. Role of Pt aggregates in Pt/SnO₂ thin films used as gas sensors investigations of the catalytic effect. Journal of the Electrochemical Society 147 (2000) 3131.
	C. L. Henley, V. Elser and M. Mihalkovic. Structure determinations for random-tiling quasicrystals. Zeitschrift f�r Kristallographie 215 (2000) 553.
	E. Illeková and P. Duhaj. Heating rate limited kinetics of crystallization of FINEMET+Ni amorphous ribbons. Acta Physica Slovaca 50 (2000) 525-532.
	E. Illeková, M. Jergel and F. A. Kuhnast. On structural and thermal relaxation in non-crystalline Zr-Ni-Al alloys. Material Science Engineering A278 (2000) 27-35.
	S. N. Kane, A. Gupta, L. Kraus and P. Duhaj. Effect of Nb content on the structural and magnetic properties of amorphous Co₂₁Fe_64-xNb_xB₁₅ alloys. Journal of Magnetism and Magnetic Materials 215 (2000) 375.
	M. Krajčí and J. Hafner. Electronic and magnetic properties of hexagonal rare-earth-Zn-Mg compounds and their relation to the properties of icosahedral alloys. Journal of Physics: Condensed Matter 12 (2000) 5831-5842.
	M. Krajčí, J. Hafner and M. Mihalkovic. Atomic and electronic structure of decagonal Al-Ni-Co alloys and approximant phases. Physical Review B62 (2000) 243-255.
	I. Skorvánek, P. Duhaj and R. Grossinger. Low-temperature magnetic behaviour in amorphous and nanocrystalline Fe-Nb-B alloys. Journal of Magnetism and Magnetic Materials 215 (2000) 431.
	I. Skorvánek, C. G. Kim, J. Kováč, P. Svec and R. Sato-Turtelli. Soft magnetic behaviour and permeability spectra in amorphous and nanocrystalline Fe_80.5Nb₇B_12.5 alloys. Journal of Magnetism and Magnetic Materials 215 (2000) 440.
	I. Vávra, J. Bydzovský, P. Svec, J. Dérer, V. Kamberský, Z. Frait, R. Lopusník, P. Sturc and G. Hilscher. Low-temperature studies of magnetic Fe/FeSi multilayers. Physica B 284-288 (2000) 1241.
	G. Vlasák. Direct measurement of magnetostriction of rapidly quenched thin ribbons. Journal of Magnetism and Magnetic Materials 215 (2000) 479.
	G. Vlasák, Z. Kaczkowski and P. Duhaj. Magnetostriction of the Fe_73.5Cu₁Ta₂Nb₁Si_13.5B₉ alloy. Journal of Magnetism and Magnetic Materials 215 (2000) 476.

Conference Proceedings and Books

P. Butvin and B. Butvinová.
New materials for ferromagnetic probe sensors.
In Proceedings of 4-th International Conference on New Trends in Aviation Development, ed. J. Blazek and V. Moucha (AFA GMRS Kosice, 2000) 16-22.

V. Ghetta, J.-P. Senateur, J. La Manna, G. Delabouglise, I. Mat'ko, B. Chenevier, P. Sandstrom and J.-E. Sundgren.
Temperature dependence of Ag/Ni multilayer microstructure studied by in-situ X-ray diffraction.
In Mat. Res. Soc. Symp. Proc. Vol. 562 (Elsevier, Amsterdam, 1999) 63.

V. Jancárik, P. Svec, J. Bydzovský, M. Kollár and G. Vlasák.
Magnetoelastic properties of Co₂₁Fe_64-xNb_xB₁₅ amorphous alloy.
In Proc. 4th Japan - Central European Joint Workshop on Energy and Information in Non-Linear Systems, Brno, November 10 - 12, 2000, ed. T. Honma, A. Gottvald, I. Zemanek and M. Nevesely (Masaryk University, Brno, 2000) 64.

K. R. Pirota, L. Kraus, F. Fendrych and P. Svec.
GMI in stress-annealed Co₇₇Fe₈B₁₅ amorphous ribbons for stress-sensor applications.
In Eurosensors XIV, August 27 - 30, 2000, Copenhagen (Elsevier, Amsterdam, 2000) 201.

look for our publications at the Los Alamos preprint archive or its mirror in Trieste.

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	P. Butvin and B. Butvinová. New materials for ferromagnetic probe sensors. In Proceedings of 4-th International Conference on New Trends in Aviation Development, ed. J. Blazek and V. Moucha (AFA GMRS Kosice, 2000) 16-22.
	V. Ghetta, J.-P. Senateur, J. La Manna, G. Delabouglise, I. Mat'ko, B. Chenevier, P. Sandstrom and J.-E. Sundgren. Temperature dependence of Ag/Ni multilayer microstructure studied by in-situ X-ray diffraction. In Mat. Res. Soc. Symp. Proc. Vol. 562 (Elsevier, Amsterdam, 1999) 63.
	V. Jancárik, P. Svec, J. Bydzovský, M. Kollár and G. Vlasák. Magnetoelastic properties of Co₂₁Fe_64-xNb_xB₁₅ amorphous alloy. In Proc. 4th Japan - Central European Joint Workshop on Energy and Information in Non-Linear Systems, Brno, November 10 - 12, 2000, ed. T. Honma, A. Gottvald, I. Zemanek and M. Nevesely (Masaryk University, Brno, 2000) 64.
	K. R. Pirota, L. Kraus, F. Fendrych and P. Svec. GMI in stress-annealed Co₇₇Fe₈B₁₅ amorphous ribbons for stress-sensor applications. In Eurosensors XIV, August 27 - 30, 2000, Copenhagen (Elsevier, Amsterdam, 2000) 201.