Torque magnetometry in YBa2Cu3O7-δ single crystals using high sensitive micromechanical torsional oscillator

PEREZ-MORELO, D.; PASTORIZA, H.

Buenos Aires

Conferencia; 27th International Conference on Low Temperature Physics (LT27); 2014

IUPAP

We have developed a high-sensitive micro-torsional oscillators and fabricated with a standard silicon process, as a platform to study the low temperatures magnetic properties of micron sized samples. When the oscillator-sample system interacts with a magnetic field, the displacement of the oscillator from its equilibrium position can be detected as a small change in the capacitance (≈ 0.001 pF). We use this device to study the magnetic response of a thick twinned YBa2Cu3O7−δ disk when the magnetic field is tilted away from the c axis in the temperature range 80 K < T < 100 K (Tc ≈ 92 K).