Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 14: General Spintronics

MA 14.3: Talk

Monday, March 16, 2020, 15:30–15:45, HSZ 401

Highly compliant planar Hall effect sensors — •Rico Illing, Tobias Kosub, Pablo Granell, Eduardo Sergio Oliveros Mata, Jürgen Faßbender, and Denys Makarov — Helmholtz-Zentrum Dresden-Rossendorf, Institut für Ionenstrahlphysik und Materialforschung

Shapeable magnetoelectronics [1] is an integral part of prospective measurement technology for consumer electronics, medical appliances and entertainment electronics including smart textiles and electronic skins [2]. Especially for medical applications, the sensitivity of the contemporary flexible magnetic field sensors should be substantially improved to the level of 1 nT or even below. Planar Hall effect (PHE) sensors are exceptionally suited for reaching this ambitious goal. In this respect, rigid PHE sensors reveal sensitivity of 5 pT [3]. Here, we present a highly compliant magnetic field sensor based on the planar Hall effect prepared on ultrathin polymeric foils. By optimizing the sensor design and measurement methodology, we boost the sensitivity of the PHE sensors to sub-10 nT, which is more than an order of magnitude improvement compared to the state of the art devices [4]. [1] D. Makarov et al., Appl. Phys. Rev. 3, 011101 (2016). [2] J. Ge et al., Nature Communications 10, 4405 (2019). [3] N. Nhalil et al., IEEE Sensors Letters 3, 2501904 (2019). [4] P. Granell et al., npj Flexible Electronics 3, 3 (2019).