The Effect of Fe Doping on the Magnetic and Magnetocaloric Properties of Mn5−xFexGe3
The magnetic and magnetocaloric properties of a series of minutely doped Mn5-xFexGe3 compounds that exhibit the D88-type hexagonal crystal structure at room temperature have been investigated. For all Fe concentrations, the alloys are ferromagnetic and undergo a second-order ferromagnetic-to-paramag...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/9854184 |
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| author | Jeffrey Brock Nathanael Bell-Pactat Hong Cai Timothy Dennison Tucker Fox Brandon Free Rami Mahyub Austin Nar Michael Saaranen Tiago Schaeffer Mahmud Khan |
| author_facet | Jeffrey Brock Nathanael Bell-Pactat Hong Cai Timothy Dennison Tucker Fox Brandon Free Rami Mahyub Austin Nar Michael Saaranen Tiago Schaeffer Mahmud Khan |
| author_sort | Jeffrey Brock |
| collection | DOAJ |
| description | The magnetic and magnetocaloric properties of a series of minutely doped Mn5-xFexGe3 compounds that exhibit the D88-type hexagonal crystal structure at room temperature have been investigated. For all Fe concentrations, the alloys are ferromagnetic and undergo a second-order ferromagnetic-to-paramagnetic transition near room temperature. Although the small Fe doping had little effect on the ferromagnetic transition temperatures of the system, changes in the saturation magnetization and magnetic anisotropy were observed. For x≤0.15, all compounds exhibit nearly the same magnetic entropy change of ~7 J/kg K, for a field change of 50 kOe. However, the magnitude of the refrigerant capacities increased with Fe doping, with values up to 108.5 J/kg and 312 J/kg being observed for field changes of 20 kOe and 50 kOe, respectively. As second-order phase transition materials, the Mn5-xFexGe3 compounds are not subject to the various drawbacks associated with first-order phase transition materials yet exhibit favorable magnetocaloric effects. |
| format | Article |
| id | doaj-art-fa54e0d180784975ac217049f92ec808 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-fa54e0d180784975ac217049f92ec8082025-02-03T06:07:01ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/98541849854184The Effect of Fe Doping on the Magnetic and Magnetocaloric Properties of Mn5−xFexGe3Jeffrey Brock0Nathanael Bell-Pactat1Hong Cai2Timothy Dennison3Tucker Fox4Brandon Free5Rami Mahyub6Austin Nar7Michael Saaranen8Tiago Schaeffer9Mahmud Khan10Department of Physics, Miami University, Oxford, OH 45056, USADepartment of Physics, Miami University, Oxford, OH 45056, USADepartment of Physics, Miami University, Oxford, OH 45056, USADepartment of Physics, Miami University, Oxford, OH 45056, USADepartment of Physics, Miami University, Oxford, OH 45056, USADepartment of Physics, Miami University, Oxford, OH 45056, USADepartment of Physics, Miami University, Oxford, OH 45056, USADepartment of Physics, Miami University, Oxford, OH 45056, USADepartment of Physics, Miami University, Oxford, OH 45056, USADepartment of Physics, Miami University, Oxford, OH 45056, USADepartment of Physics, Miami University, Oxford, OH 45056, USAThe magnetic and magnetocaloric properties of a series of minutely doped Mn5-xFexGe3 compounds that exhibit the D88-type hexagonal crystal structure at room temperature have been investigated. For all Fe concentrations, the alloys are ferromagnetic and undergo a second-order ferromagnetic-to-paramagnetic transition near room temperature. Although the small Fe doping had little effect on the ferromagnetic transition temperatures of the system, changes in the saturation magnetization and magnetic anisotropy were observed. For x≤0.15, all compounds exhibit nearly the same magnetic entropy change of ~7 J/kg K, for a field change of 50 kOe. However, the magnitude of the refrigerant capacities increased with Fe doping, with values up to 108.5 J/kg and 312 J/kg being observed for field changes of 20 kOe and 50 kOe, respectively. As second-order phase transition materials, the Mn5-xFexGe3 compounds are not subject to the various drawbacks associated with first-order phase transition materials yet exhibit favorable magnetocaloric effects.http://dx.doi.org/10.1155/2017/9854184 |
| spellingShingle | Jeffrey Brock Nathanael Bell-Pactat Hong Cai Timothy Dennison Tucker Fox Brandon Free Rami Mahyub Austin Nar Michael Saaranen Tiago Schaeffer Mahmud Khan The Effect of Fe Doping on the Magnetic and Magnetocaloric Properties of Mn5−xFexGe3 Advances in Materials Science and Engineering |
| title | The Effect of Fe Doping on the Magnetic and Magnetocaloric Properties of Mn5−xFexGe3 |
| title_full | The Effect of Fe Doping on the Magnetic and Magnetocaloric Properties of Mn5−xFexGe3 |
| title_fullStr | The Effect of Fe Doping on the Magnetic and Magnetocaloric Properties of Mn5−xFexGe3 |
| title_full_unstemmed | The Effect of Fe Doping on the Magnetic and Magnetocaloric Properties of Mn5−xFexGe3 |
| title_short | The Effect of Fe Doping on the Magnetic and Magnetocaloric Properties of Mn5−xFexGe3 |
| title_sort | effect of fe doping on the magnetic and magnetocaloric properties of mn5 xfexge3 |
| url | http://dx.doi.org/10.1155/2017/9854184 |
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