TANMS Graduate Student Wins Best Poster Award at the 2018 IEEE International Magnetics Conference in Singapore

TANMS is proud to recognize TANMS Graduate Student, Qianchang Wang, for winning Best Poster Award at the 2018 IEEE International Magnetics Conference in Signapore. Qianchang is a fourth year Ph.D. candidate under Professor Gregory Carman in the UCLA Department of Mechanical and Aerospace Engineering. Her research focuses on modeling multiferroic systems coupled with spin-orbit torque using finite element method, with applications in magnetic memory and logic.  This work numerically demonstrates the ultra energy efficiency of multiferroic control of a nanoscale magnetic memory bit. The energy consumption is as low as 22 aJ per flip for a Terfenol-D disk, which is 3-4 orders more energy efficient than current-based control mechanisms. 

[The following is the title/abstract of the paper that was presented at the 2018 Intermag Conference]

Voltage Induced Strain-mediated Perpendicular Magnetization Control for In-memory Computing Device

ABSTRACT: Magnetic memory has attracted substantial attention due to its promise of high energy efficiency combined with non-volatility. Conventionally, the magnetization is controlled by spin-transfer torque (STT) current but ohmic heating makes the current-based switching mechanisms energy inefficient (100fJ/flip). In contrast, strain-mediated multiferroic composites (i.e. coupled magnetoelastic and piezoelectric thin films) provide ultra-high energy efficiency as high as 100aJ/flip due to negligible induced current during the switching process.  In this study, a fully coupled model is used to simulate strain-mediated magnetization control of nanodots with perpendicular magnetic anisotropy (PMA) on a PZT (Pby[ZrxTi1-x]O3) thin film. This model is also used to study Bennet clocking of nanodot arrays.