Our research group is equipped with two molecular beam epitaxy (MBE) systems fabricated by Riber and Prevac.

Riber system configuration:

• material sources: 5 electron guns and 3 Knudsen cells
• linear shutter for wedge shaped layer growth
• reflection of high energy electron diffraction (RHEED)
• low energy electron diffraction (LEED)
• Auger electron spectroscopy (AES)

Prevac system configuration:

• material sources: 12 electron guns and 8 Knudsen cells
• linear shutter for wedge shaped layer growth
• reflection of high energy electron diffraction (RHEED)
• low energy electron diffraction (LEED)
• Auger electron spectroscopy (AES)
• electron gun for sample heating / bombardment
• ion gun (noble gases, energy up to 25 keV) for sample etching or structure modifications
• magnetooptical Kerr effect magnetometer (MOKE): polar and transversal configurations; magnetic field up to 5 kOe
• scanning probe microscopy (SPM) (VT Omicron XA Series) including the following modes: scanning tunneling microscopy (STM), atomic force micrsocopy (AFM), magnetic force microscopy (MFM) and others

Moreover numerous ex-situ investigation techniques are widely available at our Institute under cooperation with other research group such as:

• x-ray diffraction (XRD)
• magnetometry measurements VSM, SQUID, TM
• atomic and magnetic force microscopy (AFM/ MFM)
• scanning electron microscopy (SEM)
• electron nanolithography

AFM image of the Au islands self-assembled on a Mo surface

MFM image of magnetization reversal of magnetic dots (lower part of the image) under the applied external magnetic field

The Laboratory is equipped with two femtosecond lasers systems (one with light amplifier has been recently installed with SPINLAB support).

Our results of light modification of magnetic films Our results in non-linear magnetooptics

Description

Spectra-Physics: Amplifier Spitfire Ace (5mJ, 35fs, 800nm, 1kHz) ; Optical Parametric Amplifier (Topas, 290nm-2600 nm);
MaiTai SP (20fs, 0.6W, 780-820nm); MaiTai HP (80fs, 3W, 690-1040 nm, 80MHz)

Research:

• Magneto-optical spectroscopy
• Magnetization induced SHG
• Static and dynamics of domain structure
• Magnetic anisotropy and phase transition
• Light-induced magnetic effects

Materials:

• Ultrathin metalic films
• Nanopatterned structures
• YIG:Co exchange-coupled structured
• Light-sensitivity semicondutors

Contact person: dr hab. Andrzej Stupakiewicz prof. UwB, E-mail:and@uwb.edu.pl
Keywords: femtosecond laser, ultra-fast dynamics, second harmonics generation, magneto-optical Kerr effect

SPM images gallery / Galeria zdjęć SPM

Scanning Probe Microscope is equipped with electro-magnets system (either in-plane magnetic field up to 0.2T or perpendicular field up to 0.1T), cold finger system (110K-450K), vacuum chamber (10^-6 Torr), vibration isolation system and videomicroscope with manual continuous zoom. Study of surface topography as well as magnetic, electrical and electrochemical properties is possible. Force and voltage lithography is available. Measurements can be done in both high vacuum and in air (contact AFM, LFM, Resonant Mode (semicontact + noncontact AFM), Phase Imaging, Force Modulation (viscoelastisity), MFM, EFM, Adhesion Force Imaging, AFM Litography-Force, Spreading Resistance Imaging ("conductive" AFM), AFM Litography-Voltage, Scanning Capacitance Imaging, Scanning Kelvin Microscopy) as well as in a liquid (contact AFM, LFM, Adhesion Force, Force Modulation (viscoelastisity), Resonant Mode (semicontact AFM), Phase Imaging, AFM Litography-Force).

Contact person: mgr Piotr Mazalski, e-mail:piotrmaz@uwb.edu.pl
Keywords: scanning probe microscopy, atomic force microscopy, magnetic force microscopy

High Sensitivity Magneto-Optical Kerr Magnetometer equipped with special electro-magnets system (perpendicular to the plane sample up to 20kOe and in-plane up to 4kOe magnetic field), Coherent Ar (Innova 300), dye (599-2) and red-diode lasers, optical cryostat (10-350K), photo-elastic modulator (s,p-polarization, rotation and ellipticity polar, longitudinal, transverse Kerr effects, linear and circular dichroism). Study of static and dynamics magnetization reversal processes and vector magnetization analysis in ultrathin multilayer magnetic films with specialized LabView software for control magnetometer and data analysis.

Contact person: dr hab. Andrzej Stupakiewicz prof. UwB, E-mail:and@uwb.edu.pl
Keywords: magneto-optical Kerr effect, magnetization reversal processes, photomagnetic effects, magneto-optical spectroscopy, linear and circular dichroism

Laboratory is equipped with self-constructed optical systems and SPINLAB supported bought microscope system.

1. Carl Zeiss Jenapol optical polarizing Kerr microscope
2. special electro-magnets (out-of-plane or in-plane, static and pulse magnetic field),
3. Carl Zeiss Xe and halogen lamps;
4. high sensitivity 12-bit MicroMax CCD camera.

Study of statics and dynamics of domain structure (mainly in nanostructures) is possible by the structure imaging with both perpendicular and in-plane magnetization components. Specialized image processing techniques and LabView software for control and data analysis were developed.

Contact person: dr hab. Maria Tekielak, E-mail:tekmar@uwb.edu.pl
Keywords: magneto-optical Kerr effect, magnetic domain structure, static and dynamics magnetic domain wall

Short description

A high - sensitivity ferromagnetic resonance spectrometer at a microwave frequency of 9.5 GHz and at room temperatures with computerized data collection systems for magnetic anisotropy analysis.

Full description

A high - sensitivity ferromagnetic resonance spectrometer at a microwave frequency of 9.5 GHz and room temperatures with computerized data collection systems. The FMR spectra are investigated as a function of the orientation of the applied dc field. Study of magnetic anisotropy in thin and super thin magnetic samples.

Contact person: dr. Ryszard Gieniusz, E-mail:gieniusz@uwb.edu.pl
Keywords:Ferromagnetic resonance, magnetic anisotropy, magnetic films.