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Molecular Beam Epitaxy (MBE) systems
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Femtosecond lasers based magnetooptical laboratory
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Scanning Probe Microscope
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High Sensitivity Magneto-Optical Kerr Magnetometer
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Magnetometers based on optical polarizing microscopes
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3D magnetic field system for magnetooptic investigations
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Time and space resolved BLS system
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Cryogen free systems for magnetooptical investigations
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Ferromagnetic resonance spectrometer
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Molecular Beam Epitaxy (MBE) systems
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
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MFM image of magnetization reversal of magnetic dots (lower part of the image) under the applied external magnetic field
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Femtosecond lasers based magnetooptical laboratory 
The Laboratory is equipped with two femtosecond lasers systems (one with light amplifier has been recently installed with
SPINLAB support).
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
Scanning Probe Microscope Solver HV+ Ntegra Prima NT-MDT
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
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
Magnetometers based on optical polarizing microscopes
Laboratory is equipped with self-constructed optical systems and SPINLAB supported bought microscope system.
- Carl Zeiss Jenapol optical polarizing Kerr microscope
- special electro-magnets (out-of-plane or in-plane, static and pulse magnetic field),
- Carl Zeiss Xe and halogen lamps;
- 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.
SPINLAB supported system
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- High-end wide-field polarization microscope (Zeiss optics)
- Rotatable electromagnet for H|| up to 10 kOe
- Electromagnet for H up to 10 kOe
- High-resolution and sensitive Digital CCD camera
- Video microscopy (contrast enhancement by real-time difference imaging, movies of magnetization processes)
- Simultaneous measurement of local M(H)-curves and recording of underlying domain processes
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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
3D magnetic field system for magnetooptic investigations
3D magnetic field system for magnetooptic investigations.
SPINLAB supported system
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- 8 water cooled magnetic poles generate magnetic field in the whole 3D space,
- maximal value of the magnetic field H~0.3-0.53 T, depending on the magnetic field H orientation in the space (described by θ ad φ angles),
- good homogeneity of the magnetic field,
- possibility of the sample movement in the x, y , and z directions,
- hysteresis loops study PMOKE and LMOKE configurations,
- possibility of the sample scan- “maps” of the hysteresis loops and magnetooptical and magnetic parameters,
- laser beam spot size down to ~50 µm,
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Distribution of the magnetic field in the 3D space
Red arrows indicate localizations of the magnetic poles in the 3D space
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Time and space resolved Brillouin light scattering system
SPINLAB supported system
Macro BLS:
- Spatial resolution 40 μm
- Wave vector range 0 – 2.4 105 cm-1
Micro BLS:
- Spatial resolution 250 nm
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Micro and Macro BLS:
- Detection of spin waves (thermal and excited by microstripe antenna) and phonons
- Frequency resolution to 1MHz
- Temporary resolution down to 1ns
- Contrast: 1:1010 (multi-pass arrangement)
- Measurements of two-dimensional maps of spin-waves intensity.
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Macro BLS setup (time and space resolved option)
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Micro BLS setup
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Applied Physics Letters, Vol. 99, No. 1. (2011), 012505
Cryogen free systems for magnetooptical investigations
SPINLAB supported system
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Closed-cycle, cryo-free cryostat DE-204 PF Advanced Research System, Inc, USA, for magnetooptical-Kerr-microscopy-investigation of spatial distribution of magnetization.
- Four quartz windows for visible optical range;
- Ultra-low vibration level at sample (5 nm at 2.4 Hz);
- Temperature range 10 - 350 K;
- Computer-controlled system for 3D-positioning of the cryostat in respect to an optical axis (the range of shift in each direction – 15 mm).
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Closed-cycle, cryo-free cryostat CFSM7T-1.5 OXFORD INSTRUMENTS PLC for magnetooptical investigation of ultra-fast magnetization processes in low temperatures and high magnetic field.
- Four quartz windows for visible optical range;
- Superconducting magnetic coils 7T@1.5K
- Temperature range 1.5 - 350 K.
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Ferromagnetic resonance spectrometer
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.
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