Physics of the Solid State
Enhancement of magnetocaloric efficiency of Gd spacer between strong ferromagnets
Pashenkin I. Yu.1, Polushkin N. I.1, Sapozhnikov M. V.1, Demidov E. S.2, Kravtsov E. A.3,4, Fraerman A. A.1
1Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia
2Lobachevsky State University, Nizhny Novgorod, Russia
3M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
4Ural Federal University after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia
2Lobachevsky State University, Nizhny Novgorod, Russia
3M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
4Ural Federal University after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia
Email: nip@ipmras.ru
The magnetocaloric properties of a thin spacer of gadolinium (Gd) between layers of "strong" ferromagnets (relatively high Curie temperatures) are studied experimentally. It is found that, at room temperatures, the magnetocaloric efficiency Delta S/Delta H (Delta S is the isothermal magnetic entropy change and Delta H is the range of applied magnetic fields) of Gd spacer of thickness of 3 nm is up to two orders in magnitude higher than this value in an individual thicker (30 nm) Gd layer. This opens up opportunities for using the magnetocaloric effect in micro(nano)electronics and biomedicine using relatively weak magnetic fields H<1 kOe. The observed increase in the magnetocaloric efficiency is explained by the influence of direct exchange coupling between Gd spacer and its surroundings, which changes the distribution of magnetization in the spacer and, ultimately, its magnetocaloric potential. Keywords: magnetocaloric effect, magnetic heterostructures, exchange coupling at interfaces, Curie temperature.
- A.M. Tishin, Y.I. Spichkin. The magnetocaloric effect and its application. IOP Publishing Ltd., Bristol and Philadelphia (2003). 475 p
- K.A. Gschneidner Jr, V.K. Pecharsky, A.O. Tsokol. Rep. Prog. Phys. 68, 1479 (2005)
- T. Mukherjee, S. Sahoo, R. Skomski, D.J. Sellmyer, Ch. Binek. Phys. Rev. B 79, 144406 (2009)
- M.R. Dudek, K.K. Dudek, W. Wolak, K.W. Wojciechowski, J.N. Grima. Sci. Rep. 9, 17607 (2019)
- M.H. Phan, S. Chandra, N.S. Bingham, H. Srikanth, C.L. Zhang, S.W. Cheong, T.D. Hoang, H.D. Chinh. Appl. Phys. Lett. 97, 242506 (2010)
- P. Lampen-Kelley, R. Madhogaria, N.S. Bingham, M.H. Phan, P.M.S. Monteiro, N.-J. Steinke, A. Ionescu, C.H.W. Barnes, H. Srikanth. Phys. Rev. Mater. 5, 094404 (2021)
- A.M. Tishin, Y.I. Spichkin, V.I. Zverev, P.W. Egolf. Int. J. Refrig. 68, 177 (2016)
- A.A. Fraerman and I.A. Shereshevskii, JETP Letters 101, 9, 618 (2015)
- A.A. Fraerman. JETP Letters, 113, 5, 356 (2021)
- M.A. Kuznetsov, A.B. Drovosekov, A.A. Fraerman. Journal of Experimental and Theoretical Physics 132, 1, 79 (2021)
- E.V. Skorokhodov, E.S. Demidov, S.N. Vdovichev, A.A. Fraerman. Journal of Experimental and Theoretical Physics 124, 4, 617 (2017)
- S.N. Vdovichev, N.I. Polushkin, I.D. Rodionov, V.N. Prudnikov, J. Chang, A.A. Fraerman. Phys. Rev. B 98, 014428 (2018)
- N.I. Polushkin, I.Y. Pashenkin, E. Fadeev, E. Lahderanta, A.A.Fraerman. J. Magn. Magn. Mater. 491, 165601 (2019)
- M.A. Kuznetsov, I.Y. Pashenkin, N.I. Polushkin, M.V. Sapozhnikov, A.A. Fraerman. J. Appl. Phys. 127, 18, 183904 (2020)
- C.W. Miller, D.D. Belyea, B.J. Kirby. J. Vac. Sci. Techn. A 32, 040802 (2014)
- L. Helmich, M. Bartke, N. Teichert, B. Schleicher, S. Fahler, A. Hutten. AIP Adv. 7, 056429 (2017)
- D. Haskel, G. Srajer, J.C. Lang, J. Pollmann, C.S. Nelson, J.S. Jiang, S.D. Bader. Phys. Rev. Lett. 87, 20, 207201 (2001)
- A.B. Drovosekov, N.M. Kreines, A.O. Savitsky, E.A. Kravtsov, M.V. Ryabukhina, V.V. Proglyado, V.V. Ustinov. J. Phys.: Condens. Matter 29, 115802 (2017)
- B. Khodadadi, J.B. Mohammadi, C. Mewes, T. Mewes, M. Manno, C. Leighton, C.W. Miller. Phys. Rev. B 96, 054436 (2017)
- M. Taborelli, R. Allenspach, G. Boffa, M. Landolt. Phys. Rev. Lett. 56, 2869 (1986)
- J.F. Cochran, J.R. Dutcher. J. Appl. Phys. 64, 6092 (1988)
Подсчитывается количество просмотров абстрактов ("html" на диаграммах) и полных версий статей ("pdf"). Просмотры с одинаковых IP-адресов засчитываются, если происходят с интервалом не менее 2-х часов.
Дата начала обработки статистических данных - 27 января 2016 г.
