Key parameters for detectivity improvement of low noise anisotropic magnetoresistive sensors made of La2/3Sr1/3MnO3 single layers on vicinal substrates
Author
Enger, Luiz G.; Flament, Stéphane; Bhatti, Imtiaz N.; Rousseau, Olivier; Guillet, Bruno; Sing, Marc Lam Chok; Pierron, Victor; Lebargy, Sylvain; Chaluvadi, Sandeep K.; Domengés, Bernadette; Vera, Arturo; Díez, Jose M.; Martínez, Isidoro; Guerrero, Rubén; Pérez, Lucas; Gonzalez, Maria T.; Miranda Soriano, Rodolfo; Camarero, Julio; Perna, Paolo; Méchin, LaurenceEntity
UAM. Departamento de Física Teórica de la Materia CondensadaPublisher
American Chemical SocietyDate
2023-01-17Citation
10.1021/acsaelm.2c01096
ACS Applied Electronic Materials 5.2 (2023): 729-739
ISSN
2637-6113 (online)DOI
10.1021/acsaelm.2c01096Funded by
This project has received funding from the European Union Horizon 2020 research and innovation program under grant agreement No 737116. The work in Spain was supported by the Regional Government of Madrid and by the AEI through Projects P2018/NMT-4321 (NANOMAGCOST-CM) and PID2021-122980OB-C52 (ECLIPSE-ECoSOx), respectively. IMDEA Nanoscience Institute is supported by the “Severo Ochoa” Programme for Centres of Excellence in R&D, (MINECO grant SEV-2016-0686)Project
info:eu-repo/grantAgreement/EC/H2020/737116/EU//ByAxon; Gobierno de España. PID2021-122980OB-C52; Gobierno de España. SEV-2016-0686Editor's Version
https://doi.org/10.1021/acsaelm.2c01096Subjects
Magnetic Sensor; Anisotropic Magnetoresistance; Manganite; Thin Film; Vicinal Substrate; FísicaRights
© 2023 American Chemical SocietyAbstract
The current trend in magnetoresistive sensors development is to increase the sensitivity of single sensing elements by using multilayer structures and to design them into arrays. Such arrays are designed to compensate the excess low frequency noise of individual elements, which limits their magnetic resolution. Here, we report the modeling, design, and fabrication of single layer anisotropic magnetoresistive (AMR) sensors using low noise epitaxial La2/3Sr1/3MnO3 (LSMO) oxide thin films deposited on vicinal SrTiO3 substrates. The fabrication process is simple, and the operation of the sensor is based on a step-induced uniaxial magnetic anisotropy, described using the Stoner-Wohlfarth model. A coherent magnetization reversal process is observed by magneto-optical Kerr effect imaging. A good agreement between experimental data and the expected sensor response confirms the correct operation of the device. Three main fabrication parameters, namely the vicinal angle of the substrate, the deposition temperature, the thin film thickness, and their effects on film anisotropy field and device detectivity have been studied. Detectivity levels as low as 1.4 nT Hz-1/2 at 1 Hz and 240 pT Hz-1/2 in the white noise region are achieved with a single Wheatstone bridge element operating at 310 K. Compared to GMR and AMR sensors, these results are promising for further development and for their use as single layer LSMO low field AMR sensors, including applications as implantable biomedical devices
Files in this item
Google Scholar:Enger, Luiz G.
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Flament, Stéphane
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Bhatti, Imtiaz N.
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Rousseau, Olivier
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Guillet, Bruno
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Sing, Marc Lam Chok
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Pierron, Victor
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Lebargy, Sylvain
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Chaluvadi, Sandeep K.
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Domengés, Bernadette
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Vera, Arturo
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Díez, Jose M.
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Martínez, Isidoro
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Guerrero, Rubén
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Pérez, Lucas
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Gonzalez, Maria T.
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Miranda Soriano, Rodolfo
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Camarero, Julio
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Perna, Paolo
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Méchin, Laurence
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