Actuating a Magnetic Shape Memory Element Locally with a Set of Coils
The local actuation of a magnetic shape memory (MSM) element as used in an MSM micropump is considered. This paper presents the difference between an electromagnetic driver and a driver that uses a rotating permanent magnet. For the magnetic field energy of the permanent magnetic drive, the element...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/4/536 |
| _version_ | 1797540006719389696 |
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| author | Andrew Armstrong Peter Müllner |
| author_facet | Andrew Armstrong Peter Müllner |
| author_sort | Andrew Armstrong |
| collection | DOAJ |
| description | The local actuation of a magnetic shape memory (MSM) element as used in an MSM micropump is considered. This paper presents the difference between an electromagnetic driver and a driver that uses a rotating permanent magnet. For the magnetic field energy of the permanent magnetic drive, the element takes in a significant stray field. In a particular case, energy reduction was 12.7 mJ. For an electromagnetic drive with an identical size of the MSM element, the total magnetic field energy created by the system was 2.28 mJ. Attempts to experimentally nucleate twins in an MSM element by energizing an electromagnetic drive failed even though the local magnetic field exceeded the magnetic switching field. The energy variation is an order of magnitude smaller for the electromagnetic drive, and it does not generate the necessary driving force. It was assumed in previous work that the so-called magnetic switching field presents a sufficient requirement to nucleate a twin and, thus, to locally actuate an MSM element. Here, we show that the total magnetic field energy available to the MSM element presents another requirement. |
| first_indexed | 2024-03-10T12:53:56Z |
| format | Article |
| id | doaj.art-237f5a81946b46f9a33690d2091278ed |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T12:53:56Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-237f5a81946b46f9a33690d2091278ed2023-11-21T12:04:03ZengMDPI AGMetals2075-47012021-03-0111453610.3390/met11040536Actuating a Magnetic Shape Memory Element Locally with a Set of CoilsAndrew Armstrong0Peter Müllner1Micron School of Materials Science and Engineering, Boise State University, 1910 University Ave, Boise, ID 83725, USAMicron School of Materials Science and Engineering, Boise State University, 1910 University Ave, Boise, ID 83725, USAThe local actuation of a magnetic shape memory (MSM) element as used in an MSM micropump is considered. This paper presents the difference between an electromagnetic driver and a driver that uses a rotating permanent magnet. For the magnetic field energy of the permanent magnetic drive, the element takes in a significant stray field. In a particular case, energy reduction was 12.7 mJ. For an electromagnetic drive with an identical size of the MSM element, the total magnetic field energy created by the system was 2.28 mJ. Attempts to experimentally nucleate twins in an MSM element by energizing an electromagnetic drive failed even though the local magnetic field exceeded the magnetic switching field. The energy variation is an order of magnitude smaller for the electromagnetic drive, and it does not generate the necessary driving force. It was assumed in previous work that the so-called magnetic switching field presents a sufficient requirement to nucleate a twin and, thus, to locally actuate an MSM element. Here, we show that the total magnetic field energy available to the MSM element presents another requirement.https://www.mdpi.com/2075-4701/11/4/536Ni-Mn-GaFSMAelectromagnetic couplingsmart materialsactuator |
| spellingShingle | Andrew Armstrong Peter Müllner Actuating a Magnetic Shape Memory Element Locally with a Set of Coils Metals Ni-Mn-Ga FSMA electromagnetic coupling smart materials actuator |
| title | Actuating a Magnetic Shape Memory Element Locally with a Set of Coils |
| title_full | Actuating a Magnetic Shape Memory Element Locally with a Set of Coils |
| title_fullStr | Actuating a Magnetic Shape Memory Element Locally with a Set of Coils |
| title_full_unstemmed | Actuating a Magnetic Shape Memory Element Locally with a Set of Coils |
| title_short | Actuating a Magnetic Shape Memory Element Locally with a Set of Coils |
| title_sort | actuating a magnetic shape memory element locally with a set of coils |
| topic | Ni-Mn-Ga FSMA electromagnetic coupling smart materials actuator |
| url | https://www.mdpi.com/2075-4701/11/4/536 |
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