High-Performance Flexible Magnetic Tunnel Junctions for Smart Miniaturized Instruments

Handle URI:
http://hdl.handle.net/10754/627510
Title:
High-Performance Flexible Magnetic Tunnel Junctions for Smart Miniaturized Instruments
Authors:
Amara, Selma.; Sevilla, Gallo. A. Torres; Hawsawi, Mayyada.; Mashraei, Yousof.; Mohammed, Hanan .; Cruz, Melvin E.; Ivanov, Yurii. P.; Jaiswal, Samridh.; Jakob, Gerhard.; Kläui, Mathias.; Hussain, Muhammad.; Kosel, Jurgen.
Abstract:
Flexible electronics is an emerging field in many applications ranging from in vivo biomedical devices to wearable smart systems. The capability of conforming to curved surfaces opens the door to add electronic components to miniaturized instruments, where size and weight are critical parameters. Given their prevalence on the sensors market, flexible magnetic sensors play a major role in this progress. For many high-performance applications, magnetic tunnel junctions (MTJs) have become the first choice, due to their high sensitivity, low power consumption etc. MTJs are also promising candidates for non-volatile next-generation data storage media and, hence, could become central components of wearable electronic devices. In this work, a generic low-cost regenerative batch fabrication process is utilized to transform rigid MTJs on a 500 {\mu}m silicon wafer substrate into 5 {\mu}m thin, mechanically flexible silicon devices, and ensuring optimal utilization of the whole substrate. This method maintains the outstanding magnetic properties, which are only obtained by deposition of the MTJ on smooth high-quality silicon wafers. The flexible MTJs are highly reliable and resistive to mechanical stress. Bending of the MTJ stacks with a diameter as small as 500 {\mu}m is possible without compromising their performance and an endurance of over 1000 cycles without fatigue has been demonstrated. The flexible MTJs were mounted onto the tip of a cardiac catheter with 2 mm in diameter without compromising their performance. This enables the detection of magnetic fields and the angle which they are applied at with a high sensitivity of 4.93 %/Oe and a low power consumption of 0.15 {\mu}W, while adding only 8 {\mu}g and 15 {\mu}m to the weight and diameter of the catheter, respectively.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Publisher:
arXiv
Issue Date:
4-Apr-2018
ARXIV:
arXiv:1804.01298
Type:
Preprint
Additional Links:
http://arxiv.org/abs/1804.01298v1; http://arxiv.org/pdf/1804.01298v1
Appears in Collections:
Other/General Submission; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAmara, Selma.en
dc.contributor.authorSevilla, Gallo. A. Torresen
dc.contributor.authorHawsawi, Mayyada.en
dc.contributor.authorMashraei, Yousof.en
dc.contributor.authorMohammed, Hanan .en
dc.contributor.authorCruz, Melvin E.en
dc.contributor.authorIvanov, Yurii. P.en
dc.contributor.authorJaiswal, Samridh.en
dc.contributor.authorJakob, Gerhard.en
dc.contributor.authorKläui, Mathias.en
dc.contributor.authorHussain, Muhammad.en
dc.contributor.authorKosel, Jurgen.en
dc.date.accessioned2018-04-16T11:27:42Z-
dc.date.available2018-04-16T11:27:42Z-
dc.date.issued2018-04-04en
dc.identifier.urihttp://hdl.handle.net/10754/627510-
dc.description.abstractFlexible electronics is an emerging field in many applications ranging from in vivo biomedical devices to wearable smart systems. The capability of conforming to curved surfaces opens the door to add electronic components to miniaturized instruments, where size and weight are critical parameters. Given their prevalence on the sensors market, flexible magnetic sensors play a major role in this progress. For many high-performance applications, magnetic tunnel junctions (MTJs) have become the first choice, due to their high sensitivity, low power consumption etc. MTJs are also promising candidates for non-volatile next-generation data storage media and, hence, could become central components of wearable electronic devices. In this work, a generic low-cost regenerative batch fabrication process is utilized to transform rigid MTJs on a 500 {\mu}m silicon wafer substrate into 5 {\mu}m thin, mechanically flexible silicon devices, and ensuring optimal utilization of the whole substrate. This method maintains the outstanding magnetic properties, which are only obtained by deposition of the MTJ on smooth high-quality silicon wafers. The flexible MTJs are highly reliable and resistive to mechanical stress. Bending of the MTJ stacks with a diameter as small as 500 {\mu}m is possible without compromising their performance and an endurance of over 1000 cycles without fatigue has been demonstrated. The flexible MTJs were mounted onto the tip of a cardiac catheter with 2 mm in diameter without compromising their performance. This enables the detection of magnetic fields and the angle which they are applied at with a high sensitivity of 4.93 %/Oe and a low power consumption of 0.15 {\mu}W, while adding only 8 {\mu}g and 15 {\mu}m to the weight and diameter of the catheter, respectively.en
dc.publisherarXiven
dc.relation.urlhttp://arxiv.org/abs/1804.01298v1en
dc.relation.urlhttp://arxiv.org/pdf/1804.01298v1en
dc.rightsArchived with thanks to arXiven
dc.titleHigh-Performance Flexible Magnetic Tunnel Junctions for Smart Miniaturized Instrumentsen
dc.typePreprinten
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.eprint.versionPre-printen
dc.contributor.institutionSchool of Natural Sciences, Far Eastern Federal University, 690950, Vladivostok, Russia.en
dc.contributor.institutionErich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstrasse 12, A-8700, Leoben, Austria.en
dc.contributor.institutionSingulus Technologies AG, 63796 Kahl am Main, Germany.en
dc.contributor.institutionInstitut für Physik, Johannes Gutenberg Universität Mainz, 55128 Mainz, Germany.en
dc.identifier.arxividarXiv:1804.01298en
kaust.authorAmara, Selma.en
kaust.authorSevilla, Gallo. A. Torresen
kaust.authorHawsawi, Mayyada.en
kaust.authorMashraei, Yousof.en
kaust.authorMohammed, Hanan .en
kaust.authorCruz, Melvin E.en
kaust.authorIvanov, Yurii. P.en
kaust.authorHussain, Muhammad.en
kaust.authorKosel, Jurgen.en
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