Kari Ullakko

Kari Ullakko serves as a Professor in the Department of Physics at LUT School of Engineering Sciences, LUT University, Lappeenranta, Finland. His research focuses on advanced materials engineering with particular emphasis on magnetic shape memory alloys (MSMAs) and additive manufacturing technologies. He maintains active research operations including laboratory facilities for laser-based material processing and microdevice fabrication, with direct applications in microelectromechanical systems and biomedical engineering.

Professor Ullakko's research program centers on Ni-Mn-Ga based magnetic shape memory alloys, investigating fundamental phenomena including twin boundary dynamics, phase transformations, and magnetostructural coupling. His work integrates additive manufacturing techniques such as laser powder bed fusion and directed energy deposition with micromachining processes like femtosecond laser ablation to develop functional microdevices. Key application areas include contact-free micropumps for microfluidics, microactuators for precision positioning, and hydrophobic metasurfaces for specialized surface engineering. His methodology combines experimental characterization with computational modeling to optimize material properties and device performance.

Analysis of his recent publications (2024-2025) reveals three dominant research thrusts: (1) process optimization of additive manufacturing for Ni-Mn-Ga alloys including in-situ alloying and substrate engineering, (2) fundamental studies of twin boundary mobility and phase stability under thermal and mechanical stimuli, and (3) development of hybrid microdevices integrating MSMAs with silicon-based components. His work demonstrates consistent innovation in overcoming material processing challenges while expanding the application envelope of magnetic shape memory technology into biomedical and microfluidic domains.