Advanced materials characterization with functional gradient – Laboratory prezentation

Contract 217/2006 CEEX Modul III - Promovarea competentelor romanesti in domeniul materialelor avansate cu gradient functional „VIZ-GRAF

Dr. Ing Jana PINTEA

We have research activities in the fields of:Alnico Permanent Magnets and applications;

Sintered NdFeB Permanent Magnets and applications;

Nanocompozite Materials;

Magnetic Measuring for magnetic materials and magnetic circuits;

New composite magnetic materials for unionizing electromagnetic wave

absorbers and shields (from 50 Hz frequency to microwaves: 0,8-10 GHz).

Nano-structured magnetic materials and multilayers with anisotropic

magnetoresistance and giant magnetoresistance.

Microgranular fluorescent magnetic materials for undistructive

defectoscopy.

Oxides with perovskite structure for application as sensors.

Metallo-polymer films with micron thickness for corrosion protection.

Bio-electro-magnetic compatibility

The main national projects we are involved:

CEEX M 1 69/2005 “Microsisteme de multistraturi nanometrice magnetice cu efect de magnetorezistenta gigantica (GMR) si tunelare dependenta de spin (TMR) pentru spintronicã

CEEX- Modul 1- 2005 Retea interdisciplinara destinata sintezei si studieriinanostructurilor semiconductoare şi conductoare in scopul obţinerii dedispozitive fotonice si optoelectronice şi pentru utilizarea in biologie şimedicina – nanocrystalnet;

CERES PROJECT -Metallic magnetic multilayer structures with giantmagnetoresistance for magnetic sensor applications;

New magnetic materials and electromagnetic shilds for unionizing radiationprotection (from 50 Hz-to 10 GHz);

PN II -2007 – Intelligent processing of the nano divice type spin valve withgiant magnetoresistence for spintronic aplications

CEEX M 4 19/2005 “Bio-electro,agnetic compatibility laboratory.

We cooperate with important institutions from ROMANIA:

The Faculty of Physics, University Bucharest

The Faculty of Physics, University Transilvania Brasov

University Politehnica Bucharest

The National Institute for Research and Development in Microtechnologies Bucharest

The National Institute for Research and Development in non ferrous materials;

The Faculty of Physics, University Iasi

The Faculty “Stefan cel Mare” Suceava

Another activity of our research Department:

Measurements and characterizations of magnetic materials and magnetic circuits:

• measurements and thermomagnetic analyses perfomed with the VSM Lake Shore for dia-, para-, ferromagnetic materials, on compacted solid samples, powders, thin layers, liquids in the temperature range of 8 - 1300K, in the magnetic field of Hmax ≅ 14 kOe;

• magnetic measurements in closed circuit performed with the Histerezisgraph Brockhouse measuring equipment

• the characterization of soft magnetic materials in d.c. and a.c. on torus samples in a magnetic field of 0 - 300 Oe and frequencies of 0 - 10 kHz;

• the characterization of FeSi sheets (measurement equipment on a single sheet with sizes of 85 x 500 mm2). The total power losses in a.c. can be measured at 50 Hz and 1.5 T;

• Hall efect measurement from thin film

FT-IR spectroscope

Frequency range 7,800-350 cm-1

Simultaneous TG-DTA/DSC Apparatus+ FTIR- STA 409PC +FTIRTemperature range : 25 …1500grd C

Dilatometer DIL 402 PC

Temperature range: 25 … 1600 grd C

Atomic Force Microscope Atomic Absorption Spectrometer Model SOLAAR S4

Universal equipment for thin layer deposition

Spectrophotometer UV-VIS

Analytical X ray Difractometertype D8 Advance

Material Testing Machine

Zwick T1 – FR005TN

Optical MicroscopeCarl Zeiss NU 2

AC/DC Hystograph

VSM 7300 Lake Shore

Spectrum analyzer 84115EM-E7405A9 kHz – 26.5 GHz

Shield attenuation measurement

Signal generator E8257D-540Frequence range - 250 kHz la 40GHzAmplitude: 0 la 65 dB

Horn antennas 84115EM-11966E(2Pcs) – 18 GHzFrequence range1 GHz to 18GHzPower max 300 WImpedance 50 ΩConector type N ETS Lindgreen

Power-meter 57949kHz- 110 GHzPower range: -50 - +44dBm2 sensors+2directional couplers(0,1 MHz to 4 GHz)2 sensors - 1,5MHz- 6GHz and10MHz-18GHz

Power amplifier9 KHz – 4 GHz -10W

Power amplifier 20T4G18A 4 – 18 GHz; 20W

G-TEM cell 5405 ETS Lindgreen 1 – 18 GHz

Measurement of electromagnetic field strengh

• Electronics equipments;

• Biomaterials.

structural analyses: X-ray difractometry, optical microscopy,scanning electron microscopy;

determining of physical and mechanical characteristics:hardness, microhardness tests, density, Fisher grain meansize, tensile, compression and 4-point bending strength ofplastics, ceramics, metals, and textiles;

determining of electrical characteristics

determining of magnetic characteristics: remanence coerciveforce of induction, coercive force of polarization, maximumspecific magnetic energy, permeability, power losses;

microbiological analysis