Facilities
The Quantum Design 5S MPMS (Magnetic Property Measurement System) magnetometer, equipped with a SQUID (Superconducting Quantum Interference Device) sensor, is designed to measure both AC and DC magnetic properties as a function of magnetic field and temperature. It provides precise temperature control from 1.8 K to 400 K and can apply DC magnetic fields of up to 50 kOe. Additionally, it supports AC magnetic fields of up to 3.8 Oe at frequencies ranging from 0.001 Hz to 1000 Hz.
The Quantum Design PPMS (Physical Property Measurement System) Model 6000 magnetometer is capable of measuring a variety of physical properties, including electrical and magnetic characteristics. It offers precise control of temperature and magnetic field over the ranges of 1.8 K to 400 K, 0 to 90 kOe (DC field), and up to 10 Oe (calibrated AC field) at frequencies from 10 Hz to 10 kHz. The system supports transport measurements with currents ranging from 0.01 microAmps to 5 milliAmps and the voltages from 1 mV to 95 mV.
A vibrating sample magnetometer (VSM) is used to measure magnetic and magnetoelectric properties at room temperature, with an applied DC magnetic field of up to 10 kOe. This setup offers valuable insights into the material's behavior under these conditions.
The Magneto-Optical Imaging station primarily consists of a polarized optical microscope, a cryostat with an optical window, a split-pair coil, and a camera for capturing images. This technique relies on the Faraday effect, in which the polarization plane of linearly polarized light rotates as it passes through an active Faraday material under a magnetic field parallel to the incident beam. In our setup, a Bi-doped YIG grown on a GGG substrate is used, positioned in close contact with the sample under investigation.
The TPT HB05 wire bonder welding system is designed to create electrical contacts at a micrometer scale for various devices. It offers manual control to ensure precise positioning during welding, especially on metallic and ceramic films.
A well-equipped chemistry lab featuring a variety of tools like glassware, a laminar flow cabinet, a sample cutting saw, a lab stove, and furnaces, all designed to support sample preparation and chemical experiments.
The conventional thermal evaporation method is based on depositing material using Joule heating. A high-vacuum chamber (~ 1E-6 Torr) was built for depositing various low-melting-point materials, including Pb, Sn, Ge, and Al. The system also includes two power supplies: one capable of delivering up to 100 Amps and another up to 200 Amps.
The probe station is designed for electromigration studies and features six XYZ micrometric tables for positioning the electrical contact needles, as well as an XY micrometric table with rotation for accurately positioning the sample under examination. It also includes an optical microscope with up to 900x magnification for viewing contact points. Additionally, the system is equipped with AC and DC power supplies, along with multimeters and voltmeters for measuring electrical resistance.
Universidade Federal de São Carlos - Departamento de Física
Rodovia Washington Luis, km 235 - São Carlos - SP - Brazil
Zip Code: 13565-905
Telephone: +55 016 3351-8228