Dynamical Response of Gadolinium in Alternating Magnetic Fields Up to 9 Hz
SSRN, ISSN: 1556-5068
2022
- 178Usage
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
In magnetic refrigerator, the magnetic field strength and its alternating frequency have great influence on the magnetocaloric effects of materials. In order to relationship between the magnetocaloric effect and alternating frequency of magnetic field, the direct measurements of temperature change for Gadolinium near working conditions in alternating magnetic fields up to 9 Hz are carried out. In this device, the magnetic field is alternately changed by rotating the magnet while sample holder keep stationary to defend the measurement signal interference. Results shows that the temperature change of Gd decreases from 1.5K to 0.7K with increasing field alternating frequency from 2.2 Hz to 9.0 Hz under magnetic field of 0.72T. Furthermore, based on the heat transfer between sample, thermocouple and environment, we have established a theory model to investigate the effects of different influencing factors on the temperature change of Gadolinium. And, based on the above model, it reveals that near work conditions, there are lots of influencing factors to affect the emperature change, such as sample mass, applied magnetic field mode, adiabatic conditions, field alternating frequency, and so on. The experimental and simulation results will provide the guidance for screening the best candidate of magnetocaloric materials and developing the magnetic refrigerator.
Bibliographic Details
Elsevier BV
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