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Magnetocaloric effect in superparamagnets
Journal of Magnetism and Magnetic Materials, 1992The magnetocaloric effect is calculated for superparamagnetic materials as a function of temperature, field and cluster size. Assuming classical behavior, a universal curve is calculated from which an optimum cluster moment may be found for maximum entropy change upon application of a given field H at a given temperature T. Quantum effects are shown to
R.D. McMichael +4 more
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Magnetocaloric effect in Tb3Ni
AIP Conference Proceedings, 2020The magnetocaloric effect (MCE) of Tb3Ni is discussed in this paper which is measured using dc magnetization measurements as well as specific heat measurements under magnetic field. It is found that maximum value of change in magnetic entropy was (-ΔSM) ∼6.9 J/kg-K around 60 K for a change in magnetic field of 9 T.
Srikanta Goswami, P. D. Babu, R. Rawat
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Simple enhancement of the magnetocaloric effect in giant magnetocaloric materials
Applied Physics Letters, 2003A simple method of enhancing the magnetocaloric effect (MCE)) in ferromagnetic materials is described. Thin layers of pure Fe of 0.1- and 0.2-μm thickness were evaporated onto both sides of polished 0.6-mm, slices of the giant magnetocaloric material Gd5Si1.5Ge2.5.
L. H. Lewis, M. H. Yu, R. J. Gambino
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Magnetocaloric effect of ErCo2
Journal of Magnetism and Magnetic Materials, 1999Abstract The magnetocaloric effect was examined for ErCo 2 , which shows a first-order ferrimagnetic to paramagnetic transition at 32 K. The application of a magnetic field of 8 T causes a temperature change of 13 K under adiabatic conditions.
H. Wada, S. Tomekawa, M. Shiga
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Magnetocaloric effect in Gd2PdSi3
Applied Physics Letters, 2000The influence of the application of a magnetic field (H) on the temperature (T) dependence of heat capacity and isothermal magnetization has been investigated in Gd2PdSi3, a compound ordering antiferromagnetically below (TN=)21 K in zero H. Among other findings, the one to be emphasized is the observation of significant magnetocaloric effect (MCE) over
E. V. Sampathkumaran +3 more
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Applied Physics Letters, 2007
The temperature dependence of heat capacity of MnSi has been measured in the presence of different values of magnetic field. When the magnetic field is applied, an appreciable adiabatic temperature change is observed in the compound. The entropy change due to isothermal change of magnetic field is found to be significant well above the ordering ...
Parul Arora +2 more
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The temperature dependence of heat capacity of MnSi has been measured in the presence of different values of magnetic field. When the magnetic field is applied, an appreciable adiabatic temperature change is observed in the compound. The entropy change due to isothermal change of magnetic field is found to be significant well above the ordering ...
Parul Arora +2 more
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Magnetocaloric Effect and Materials
2009A brief review for magnetocaloric effect (MCE), including its potential application to magnetic refrigeration and the corresponding magnetic materials, has been given. Focuses are recent progresses in the exploration of magnetocaloric materials which exhibit a first-order phase transition, thus a giant MCE.
J.R. Sun, B.G. Shen, F.X. Hu
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Magnetocaloric effect in DyCu2
Journal of Magnetism and Magnetic Materials, 2009Abstract The magnetocaloric effect of the rare-earth intermetallic compound DyCu2 is explored through magnetization measurements. DyCu2 is paramagnetic at the room temperature but becomes antiferromagnetic below 27 K (Neel temperature). Strong temperature and field dependence of magnetization in DyCu2 at and around the Neel temperature lead to a ...
Parul Arora +3 more
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The Magnetocaloric Effect in Neodymium
1990The adiabatic temperature change upon magnetization, ΔTs, and the field dependent heat capacity of Nd have been measured between 5 K and 40 K in applied magnetic fils up to 7 T in order to assess its potential for use as a magnetic refrigerant in an active magnetic regenerator (AMR).
C. B. Zimm +4 more
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The magnetocaloric effect on nickel
Journal of Biological Physics, 1981The original data of Weiss and Forrer are reanalyzed with the aim to obtain a precise relation between the observed temperature rise and the magnetic field strength at temperatures both above and below the Curie temperature. The application of nonlinear least squares analysis reveals that a simple dependence of the temperature rise upon the magnetic ...
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