Magnetocaloric properties and critical behavior of high relative cooling power FeNiB nanoparticles
Low cost magnetocaloric nanomaterials have attracted considerable attention for energy efficient applications. We report a very high relative cooling power (RCP) in a study of the magnetocaloric effect in quenched FeNiB nanoparticles. RCP increases from 89.8 to 640 J kg−1 for a field change of 1 and...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/102834 http://hdl.handle.net/10220/24283 |
| _version_ | 1826125033119940608 |
|---|---|
| author | Chaudhary, V. Maheswar Repaka, D. V. Chaturvedi, A. Sridhar, I. Ramanujan, R. V. |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Chaudhary, V. Maheswar Repaka, D. V. Chaturvedi, A. Sridhar, I. Ramanujan, R. V. |
| author_sort | Chaudhary, V. |
| collection | NTU |
| description | Low cost magnetocaloric nanomaterials have attracted considerable attention for energy efficient applications. We report a very high relative cooling power (RCP) in a study of the magnetocaloric effect in quenched FeNiB nanoparticles. RCP increases from 89.8 to 640 J kg−1 for a field change of 1 and 5 T, respectively, these values are the largest for rare earth free iron based magnetocaloric nanomaterials. To investigate the magnetocaloric behavior around the Curie temperature (TC ), the critical behavior of these quenched nanoparticles was studied. Detailed analysis of the magnetic phase transition using the modified Arrott plot, Kouvel-Fisher method, and critical isotherm plots yields critical exponents of β = 0.364, γ = 1.319, δ = 4.623, and α = −0.055, which are close to the theoretical exponents obtained from the 3D-Heisenberg model. Our results indicate that these FeNiB nanoparticles are potential candidates for magnetocaloric fluid based heat pumps and low grade waste heat recovery. |
| first_indexed | 2024-10-01T06:30:07Z |
| format | Journal Article |
| id | ntu-10356/102834 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:30:07Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1028342021-01-10T11:05:50Z Magnetocaloric properties and critical behavior of high relative cooling power FeNiB nanoparticles Chaudhary, V. Maheswar Repaka, D. V. Chaturvedi, A. Sridhar, I. Ramanujan, R. V. School of Mechanical and Aerospace Engineering School of Materials Science & Engineering Energy Research Institute @ NTU (ERI@N) DRNTU::Science::Physics Low cost magnetocaloric nanomaterials have attracted considerable attention for energy efficient applications. We report a very high relative cooling power (RCP) in a study of the magnetocaloric effect in quenched FeNiB nanoparticles. RCP increases from 89.8 to 640 J kg−1 for a field change of 1 and 5 T, respectively, these values are the largest for rare earth free iron based magnetocaloric nanomaterials. To investigate the magnetocaloric behavior around the Curie temperature (TC ), the critical behavior of these quenched nanoparticles was studied. Detailed analysis of the magnetic phase transition using the modified Arrott plot, Kouvel-Fisher method, and critical isotherm plots yields critical exponents of β = 0.364, γ = 1.319, δ = 4.623, and α = −0.055, which are close to the theoretical exponents obtained from the 3D-Heisenberg model. Our results indicate that these FeNiB nanoparticles are potential candidates for magnetocaloric fluid based heat pumps and low grade waste heat recovery. Published version 2014-12-02T07:31:20Z 2019-12-06T21:00:56Z 2014-12-02T07:31:20Z 2019-12-06T21:00:56Z 2014 2014 Journal Article Chaudhary, V., Maheswar Repaka, D. V., Chaturvedi, A., Sridhar, I., & Ramanujan, R. V. (2014). Magnetocaloric properties and critical behavior of high relative cooling power FeNiB nanoparticles. Journal of applied physics, 116(16), 163918-. 0021-8979 https://hdl.handle.net/10356/102834 http://hdl.handle.net/10220/24283 10.1063/1.4900736 en Journal of applied physics © 2014 AIP Publishing LLC. This paper was published in Journal of Applied Physics and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4900736]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Science::Physics Chaudhary, V. Maheswar Repaka, D. V. Chaturvedi, A. Sridhar, I. Ramanujan, R. V. Magnetocaloric properties and critical behavior of high relative cooling power FeNiB nanoparticles |
| title | Magnetocaloric properties and critical behavior of high relative cooling power FeNiB nanoparticles |
| title_full | Magnetocaloric properties and critical behavior of high relative cooling power FeNiB nanoparticles |
| title_fullStr | Magnetocaloric properties and critical behavior of high relative cooling power FeNiB nanoparticles |
| title_full_unstemmed | Magnetocaloric properties and critical behavior of high relative cooling power FeNiB nanoparticles |
| title_short | Magnetocaloric properties and critical behavior of high relative cooling power FeNiB nanoparticles |
| title_sort | magnetocaloric properties and critical behavior of high relative cooling power fenib nanoparticles |
| topic | DRNTU::Science::Physics |
| url | https://hdl.handle.net/10356/102834 http://hdl.handle.net/10220/24283 |
| work_keys_str_mv | AT chaudharyv magnetocaloricpropertiesandcriticalbehaviorofhighrelativecoolingpowerfenibnanoparticles AT maheswarrepakadv magnetocaloricpropertiesandcriticalbehaviorofhighrelativecoolingpowerfenibnanoparticles AT chaturvedia magnetocaloricpropertiesandcriticalbehaviorofhighrelativecoolingpowerfenibnanoparticles AT sridhari magnetocaloricpropertiesandcriticalbehaviorofhighrelativecoolingpowerfenibnanoparticles AT ramanujanrv magnetocaloricpropertiesandcriticalbehaviorofhighrelativecoolingpowerfenibnanoparticles |