Taskaev, S. ; Skokov, K. ; Khovaylo, V. ; Buchelnikov, V. ; Pellenen, A. ; Karpenkov, D. ; Ulyanov, M. ; Bataev, D. ; Usenko, A. ; Lyange, M. ; Gutfleisch, O. (2015)
Effect of severe plastic deformation on the specific heat and magnetic properties of cold rolled Gd sheets.
In: Journal of Applied Physics, 117 (12)
doi: 10.1063/1.4916377
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We report on specific heat and magnetic properties of thin Gd sheets obtained by means of a cold rolling technique. At temperatures well below Curie temperature TC , the cold rolling has a minor impact on the specific heat Cp . However, a well defined λ-type anomaly of Cp seen in the vicinity of TC in a polycrystalline Gd sample is markedly suppressed in the severely deformed samples. Depression of the λ peak is due to a large decrease of magnetization that presumably originates in a local magnetic anisotropy induced by the severe plastic deformation. Results of calculation of magnetocaloric effect from the Cp and magnetization data indicate that the magnetocaloric effect gradually decreases as the degree of plastic deformation increases. This trend is further confirmed by the direct measurements of the adiabatic temperature change ΔTad .
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Taskaev, S. ; Skokov, K. ; Khovaylo, V. ; Buchelnikov, V. ; Pellenen, A. ; Karpenkov, D. ; Ulyanov, M. ; Bataev, D. ; Usenko, A. ; Lyange, M. ; Gutfleisch, O. |
| Art des Eintrags: | Bibliographie |
| Titel: | Effect of severe plastic deformation on the specific heat and magnetic properties of cold rolled Gd sheets |
| Sprache: | Englisch |
| Publikationsjahr: | 28 März 2015 |
| Verlag: | AIP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 117 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1063/1.4916377 |
| Kurzbeschreibung (Abstract): | We report on specific heat and magnetic properties of thin Gd sheets obtained by means of a cold rolling technique. At temperatures well below Curie temperature TC , the cold rolling has a minor impact on the specific heat Cp . However, a well defined λ-type anomaly of Cp seen in the vicinity of TC in a polycrystalline Gd sample is markedly suppressed in the severely deformed samples. Depression of the λ peak is due to a large decrease of magnetization that presumably originates in a local magnetic anisotropy induced by the severe plastic deformation. Results of calculation of magnetocaloric effect from the Cp and magnetization data indicate that the magnetocaloric effect gradually decreases as the degree of plastic deformation increases. This trend is further confirmed by the direct measurements of the adiabatic temperature change ΔTad . |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 08 Jan 2016 09:39 |
| Letzte Änderung: | 08 Jan 2016 09:39 |
| PPN: | |
| Sponsoren: | The authors gratefully acknowledge the financial support of the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST “MISiS” and financial support of the RFBR 12-07-00676-a., The authors also gratefully acknowledge the financial support of RF President MD-770.2014.2, RSF 14-12-00570 (numerical simulation) grants and of the DFG SPP1599 programme. |
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