M. Gueltig, M. Ohtsuka, H. Miki, T. Takagi, M. Kohl
{"title":"Thermal energy harvesting by high frequency actuation of magnetic shape memory alloy films","authors":"M. Gueltig, M. Ohtsuka, H. Miki, T. Takagi, M. Kohl","doi":"10.1109/TRANSDUCERS.2015.7181024","DOIUrl":null,"url":null,"abstract":"A novel energy harvesting device using magnetic shape memory alloy (MSMA) film actuation is presented showing a power density of up to 3 mW/cm3 at a temperature change of the material of about 2 K. This exceeds the power output of previous MSMA harvesting devices by at least three orders of magnitude and challenges state-of-the-art thermoelectrics. The results are accomplished by using a tailored Ni-Co-Mn-Ga film with large temperature-dependent change of magnetization at the Curie temperature TC and a new cantilever design, with low thermal mass for rapid heat transfer in the order of 10 ms, matching the time constant of eigenoscillation.","PeriodicalId":6465,"journal":{"name":"2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2015-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/TRANSDUCERS.2015.7181024","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
A novel energy harvesting device using magnetic shape memory alloy (MSMA) film actuation is presented showing a power density of up to 3 mW/cm3 at a temperature change of the material of about 2 K. This exceeds the power output of previous MSMA harvesting devices by at least three orders of magnitude and challenges state-of-the-art thermoelectrics. The results are accomplished by using a tailored Ni-Co-Mn-Ga film with large temperature-dependent change of magnetization at the Curie temperature TC and a new cantilever design, with low thermal mass for rapid heat transfer in the order of 10 ms, matching the time constant of eigenoscillation.
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