High frequency thermal energy harvesting using magnetic shape memory films

Marcel Gueltig; Hinnerk Ossmer; Makoto Ohtsuka; Hiroyuki Miki; Koki Tsuchiya; Toshiyuki Takagi; Manfred Kohl

doi:10.1002/aenm.201400751

High frequency thermal energy harvesting using magnetic shape memory films

Marcel Gueltig, Hinnerk Ossmer, Makoto Ohtsuka, Hiroyuki Miki, Koki Tsuchiya, Toshiyuki Takagi, Manfred Kohl

Research output: Contribution to journal › Article › peer-review

66 Citations (Scopus)

Abstract

A new method for thermal energy harvesting at small temperature difference and high cycling frequency is presented that exploits the unique magnetic properties and actuation capability of magnetic shape memory alloy (MSMA) films. Polycrystalline films of the Ni_50.4Co_3.7Mn_32.8In_13.1 alloy are tailored, showing a large abrupt change of magnetization and low thermal hysteresis well above room temperature. Based on this material, a free-standing film device is designed that exhibits thermomagnetically induced actuation between a heat source and sink with short heat transfer times. The cycling frequency of the device is tuned by mechanical frequency up-conversion to over 200 Hz. An integrated pick-up coil converts the thermally induced change of magnetization as well as the kinetic energy to electricity. For a temperature change of 10 K, the maximum peak power density is in the order of 5 mW cm^-3.

Original language	English
Article number	1400751
Journal	Advanced Energy Materials
Volume	4
Issue number	17
DOIs	https://doi.org/10.1002/aenm.201400751
Publication status	Published - 2014 Dec 1

Keywords

Actuators
Energy harvesting
Magnetic films
Martensitic transformation
Shape memory films

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/aenm.201400751

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title = "High frequency thermal energy harvesting using magnetic shape memory films",

abstract = "A new method for thermal energy harvesting at small temperature difference and high cycling frequency is presented that exploits the unique magnetic properties and actuation capability of magnetic shape memory alloy (MSMA) films. Polycrystalline films of the Ni50.4Co3.7Mn32.8In13.1 alloy are tailored, showing a large abrupt change of magnetization and low thermal hysteresis well above room temperature. Based on this material, a free-standing film device is designed that exhibits thermomagnetically induced actuation between a heat source and sink with short heat transfer times. The cycling frequency of the device is tuned by mechanical frequency up-conversion to over 200 Hz. An integrated pick-up coil converts the thermally induced change of magnetization as well as the kinetic energy to electricity. For a temperature change of 10 K, the maximum peak power density is in the order of 5 mW cm-3.",

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AU - Gueltig, Marcel

AU - Ossmer, Hinnerk

AU - Ohtsuka, Makoto

AU - Miki, Hiroyuki

AU - Tsuchiya, Koki

AU - Takagi, Toshiyuki

AU - Kohl, Manfred

PY - 2014/12/1

Y1 - 2014/12/1

N2 - A new method for thermal energy harvesting at small temperature difference and high cycling frequency is presented that exploits the unique magnetic properties and actuation capability of magnetic shape memory alloy (MSMA) films. Polycrystalline films of the Ni50.4Co3.7Mn32.8In13.1 alloy are tailored, showing a large abrupt change of magnetization and low thermal hysteresis well above room temperature. Based on this material, a free-standing film device is designed that exhibits thermomagnetically induced actuation between a heat source and sink with short heat transfer times. The cycling frequency of the device is tuned by mechanical frequency up-conversion to over 200 Hz. An integrated pick-up coil converts the thermally induced change of magnetization as well as the kinetic energy to electricity. For a temperature change of 10 K, the maximum peak power density is in the order of 5 mW cm-3.

AB - A new method for thermal energy harvesting at small temperature difference and high cycling frequency is presented that exploits the unique magnetic properties and actuation capability of magnetic shape memory alloy (MSMA) films. Polycrystalline films of the Ni50.4Co3.7Mn32.8In13.1 alloy are tailored, showing a large abrupt change of magnetization and low thermal hysteresis well above room temperature. Based on this material, a free-standing film device is designed that exhibits thermomagnetically induced actuation between a heat source and sink with short heat transfer times. The cycling frequency of the device is tuned by mechanical frequency up-conversion to over 200 Hz. An integrated pick-up coil converts the thermally induced change of magnetization as well as the kinetic energy to electricity. For a temperature change of 10 K, the maximum peak power density is in the order of 5 mW cm-3.

KW - Actuators

KW - Energy harvesting

KW - Magnetic films

KW - Martensitic transformation

KW - Shape memory films

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High frequency thermal energy harvesting using magnetic shape memory films

Abstract

Keywords

UN SDGs

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