Workshop 2025: Devices based on spin-torque diode for energy harvesters and sensors: A theoretical analysis

Session Information

Location: Lecture room F3213 - 12
Day: Wednesday, 14 May
Time: 18:00 - 19:00
Chairperson: -

Presentation Details

Presentation Type: Poster presentation
Title: Devices based on spin-torque diode for energy harvesters and sensors: A theoretical analysis
Abstract: We investigate novel spintronic devices for energy harvesting and thermal sensing by integrating spin-torque diodes (STD) with materials exhibiting phase transitions and magnetic skyrmions. One such material is FeRh, which undergoes a first-order magnetic phase transition between FM and AFM states at T∼350K [1,2]. Herein, we will demonstrate the STD broadband devices able to convert the electromagnetic waves from kHz up to THz to the electrical energy with phase transitions driven by an AC input, which was predicted by theoretical models and macrospin simulations. Further, we introduce a spintronic temperature sensor based on topologically protected and stable magnetic skyrmions interfaced with magnetic tunnel junctions (MTJ) [3]. This sensor relies on the temperature-dependent resonant frequency and amplitude of skyrmions, enabling high thermal sensitivity and a linear response for nanoelectronics. Simulations confirm superior thermal stability in multilayer systems compared with single-layer ones and thus solve issues related to conventional sensors. FeRh-based STDs combined with skyrmion-based thermal sensors may open new horizons for next-generation energy harvesting, spintronics, thermal management, and nanoelectronics.

[1] C. Bordel, J. Juraszek, D. W. Cooke, C. Baldasseroni, S. Mankovsky, J. Minár, H. Ebert, S. Moyerman, E. E. Fullerton, and F. Hellman, Fe spin reorientation across the metamagnetic transition in strained FeRh thin films, Phys Rev Lett 109, (2012).
[2] J. Barker and R. W. Chantrell, Higher-order exchange interactions leading to metamagnetism in FeRh, Phys Rev B 92, 094402 (2015).
[3] G. Finocchio, F. Büttner, R. Tomasello, M. Carpentieri, and M. Kläui, Magnetic skyrmions: from fundamental to applications, J Phys D Appl Phys 49, 423001 (2016).

Presenter

Mr Michail Lianeris
Polytechnic University of Bari | Italy

Authors

1. Michail Lianeris | Department of Electrical and Information Engineering, Politecnico di Bari, Via Edoardo Orabona, 4, 70126 Bari BA, Italy
2. Riccardo Tomasello | Department of Electrical and Information Engineering, Politecnico di Bari, Via Edoardo Orabona, 4, 70126 Bari BA, Italy