PL EN


Preferences help
enabled [disable] Abstract
Number of results
2017 | 131 | 4 | 795-797
Article title

Scaling Analysis of the Magnetocaloric Effect in Co/Au Nanoparticles

Content
Title variants
Languages of publication
EN
Abstracts
EN
The system of superparamagnetic Co/Au bimetallic nanoparticles of average diameter 7 nm was investigated with respect to its magnetocaloric properties. DC magnetic measurements revealed the presence of field dependent zero field cooled M(T) maximum (6-8 K) and significant zero field cooled/field cooled irreversibility at low temperatures in the system. Documented thermal hysteresis disallow standard magnetic entropy change calculation from isothermal M(H) data, thus we attempted to employ zero field cooled M(T) data for this purpose. Magnetic entropy change was calculated employing the Maxwell relation. In maximal field variation of 1 T relative high magnetic entropy change for nanoparticles Δ S_M ≈ 0.7 J/(kg K) at T =9 K was observed. The data collapsed onto single universal curve after proper axis rescaling.
Keywords
EN
Contributors
  • Institute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
  • Institute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
author
  • Institute of Inorganic Chemistry, Faculty of Sciences, P.J. Šafárik University, Moyzesova 11, 041 54 Košice, Slovakia
author
  • Department of Condensed Matter Physics, University of Sevilla, P.O. Box 1065, 41080 Sevilla, Spain
References
  • [1] S. Ma, W.F. Li, D. Li, D.K. Xiong, N.K. Sun, D.Y. Geng, W. Liu, Z.D. Zhang, Phys. Rev. B 76, 144404 (2007), doi: 10.1103/PhysRevB.76.144404
  • [2] P. Poddar, S. Srinath, J. Gass, B.L.V. Prasad, H. Srikanth, J. Phys. Chem. C 111, 14060 (2007), doi: 10.1021/jp073274i
  • [3] R.D. McMichael, R.D. Shull, L.J. Swartzendruber, L.H. Bennett, R.E. Watson, J. Magn. Magn. Mater. 111, 29 (1992), doi: 10.1016/0304-8853(92)91049-Y
  • [4] V. Franco, A. Conde, Int. J. Refrig. 33, 465 (2010), doi: 10.1016/j.ijrefrig.2009.12.019
  • [5] V.K. Pecharsky, K.A. Gschneidner, Jr., J. Magn. Magn. Mater. 200, 44 (1999), doi: 10.1016/S0304-8853(99)00397-2
  • [6] V. Franco, A. Conde, D. Sidhaye, B.L.V. Prasad, P. Poddar, S. Srinath, M.H. Phan, H. Srikanth, J. Appl. Phys. 107, 09A902 (2010), doi: 10.1063/1.3335514
  • [7] A.M.G. Carvalho, A.A. Coelho, P.J. von Rankhe, C.S. Alves, J. Alloy Comp. 509, 3452 (2011), doi: 10.1016/j.jallcom.2010.12.088
  • [8] P. Hrubovčák, A. Zeleňáková, V. Zeleňák, J. Kováč, J. Alloy Comp. 649, 104 (2015), doi: 10.1016/j.jallcom.2015.07.044
  • [9] P. Hrubovčák, A. Zeleňáková, V. Zeleňák, J. Kováč, Acta Phys. Pol. A 126, 216 (2014), doi: 10.12693/APhysPolA.126.216
  • [10] P. Hrubovčák, A. Zeleňáková, V. Zeleňák, J. Michalíková, Solid State Phenom. 233-234, 497 (2015), doi: 10.4028/www.scientific.net/SSP.233-234.497
  • [11] H.B. Callen, Thermodynamics, Wiley, New York 1981
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv131n4061kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.