{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,8]],"date-time":"2026-02-08T16:50:34Z","timestamp":1770569434778,"version":"3.49.0"},"reference-count":42,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2020,6,17]],"date-time":"2020-06-17T00:00:00Z","timestamp":1592352000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["286471992"],"award-info":[{"award-number":["286471992"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A surface-acoustic-wave (SAW) magnetic-field sensor utilizing fundamental, first- and second-order Love-wave modes is investigated. A     4.5 \u00a0 \u03bc m     SiO2 guiding layer on an ST-cut quartz substrate is coated with a 200    n      m    (Fe90Co10)78Si12B10 magnetostrictive layer in a delay-line configuration. Love-waves are excited and detected by two interdigital transducers (IDT). The delta-E effect in the magnetostrictive layer causes a phase change with applied magnetic field. A sensitivity of 1250     \u00b0    \/   m      T    is measured for the fundamental Love mode at 263    M      Hz   . For the first-order Love mode a value of 45     \u00b0    \/   m      T    is obtained at 352    M      Hz   . This result is compared to finite-element-method (FEM) simulations using one-dimensional (1D) and two-and-a-half-dimensional (2.5 D) models. The FEM simulations confirm the large drop in sensitivity as the first-order mode is close to cut-off. For multi-mode operation, we identify as a suitable geometry a guiding layer to wavelength ratio of      h GL  \/ \u03bb \u2248 1.5     for an IDT pitch of     p = 12 \u00a0 \u03bc m    . For this layer configuration, the first three modes are sufficiently far away from cut-off and show good sensitivity.<\/jats:p>","DOI":"10.3390\/s20123421","type":"journal-article","created":{"date-parts":[[2020,6,17]],"date-time":"2020-06-17T13:11:32Z","timestamp":1592399492000},"page":"3421","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Multi-Mode Love-Wave SAW Magnetic-Field Sensors"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8511-4696","authenticated-orcid":false,"given":"Julius","family":"Schmalz","sequence":"first","affiliation":[{"name":"Integrated Systems and Photonics, Institute of Electrical Engineering and Information Technology, Kiel University, Kaiserstra\u00dfe 2, 24143 Kiel, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6759-4208","authenticated-orcid":false,"given":"Anne","family":"Kittmann","sequence":"additional","affiliation":[{"name":"Inorganic Functional Materials, Institute for Materials Science, Kiel University, Kaiserstra\u00dfe 2, 24143 Kiel, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9839-3890","authenticated-orcid":false,"given":"Phillip","family":"Durdaut","sequence":"additional","affiliation":[{"name":"Chair of Microwave Engineering, Institute of Electrical Engineering and Information Technology, Kiel University, Kaiserstra\u00dfe 2, 24143 Kiel, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4255-5947","authenticated-orcid":false,"given":"Benjamin","family":"Spetzler","sequence":"additional","affiliation":[{"name":"Multicomponent Materials, Institute for Materials Science, Kiel University, Kaiserstra\u00dfe 2, 24143 Kiel, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3367-1655","authenticated-orcid":false,"given":"Franz","family":"Faupel","sequence":"additional","affiliation":[{"name":"Multicomponent Materials, Institute for Materials Science, Kiel University, Kaiserstra\u00dfe 2, 24143 Kiel, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9352-2868","authenticated-orcid":false,"given":"Michael","family":"H\u00f6ft","sequence":"additional","affiliation":[{"name":"Chair of Microwave Engineering, Institute of Electrical Engineering and Information Technology, Kiel University, Kaiserstra\u00dfe 2, 24143 Kiel, Germany"}]},{"given":"Eckhard","family":"Quandt","sequence":"additional","affiliation":[{"name":"Inorganic Functional Materials, Institute for Materials Science, Kiel University, Kaiserstra\u00dfe 2, 24143 Kiel, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4234-7833","authenticated-orcid":false,"given":"Martina","family":"Gerken","sequence":"additional","affiliation":[{"name":"Integrated Systems and Photonics, Institute of Electrical Engineering and Information Technology, Kiel University, Kaiserstra\u00dfe 2, 24143 Kiel, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2020,6,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"657","DOI":"10.1109\/58.156185","article-title":"A novel Love-plate acoustic sensor utilizing polymer overlayers","volume":"39","author":"Gizeli","year":"1992","journal-title":"IEEE Trans. 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