Dr. Zhu Diao - Kondenserad materia och kvantoptik, Stockholm University

Title: Nanomechanical torque magnetometry: a powerful and versatile test bed for nanomagnetism

Abstract: Nanomagnetism investigates the magnetic properties of objects with at least one dimension in the nanometer scale. To date, it is still often a challenge to characterize the magnetostatic and dynamic behavior of a single nano-magnetic object in a wide temperature range and with a high sensitivity. In recent years, nanomechanical torque magnetometry has emerged to become a powerful and also versatile tool for nanomagnetism studies. In this presentation, I will give a general overview of nanomechanical torque magnetometry, largely based on my own work in the University of Alberta, Canada.  I will describe the device design, fabrication, our measurement setup, and the wealth of information this technique offers.  If time allows, I will also cover some of our ongoing work on creating an integrated optomechanical magnetometry platform, with the potential of leading to "magnet-on-a-chip" type of magnetic sensing devices.