Results 141 to 150 of about 1,572 (185)

Magnetocaloric effect in superparamagnets

Journal of Magnetism and Magnetic Materials, 1992
The 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, R.D. Shull, L.J. Swartzendruber, L.H. Bennett, R.E. Watson   +4 more
openaire   +1 more source

Magnetocaloric Effect and Materials

2009
A 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
openaire   +1 more source

Magnetocaloric effect of ErCo2

Journal of Magnetism and Magnetic Materials, 1999
Abstract 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
openaire   +1 more source

The Magnetocaloric Effect in Neodymium

1990
The 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, P. M. Ratzmann, J. A. Barclay, G. F. Green, J. N. Chafe   +4 more
openaire   +1 more source

Magnetocaloric effect in Gd2PdSi3

Applied Physics Letters, 2000
The 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, I. Das, R. Rawat, Subham Majumdar   +3 more
openaire   +1 more source

Magnetocaloric effect in MnSi

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, M. K. Chattopadhyay, S. B. Roy   +2 more
openaire   +1 more source

Magnetocaloric effect in DyCu2

Journal of Magnetism and Magnetic Materials, 2009
Abstract 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, Pragya Tiwari, V.G. Sathe, M.K. Chattopadhyay   +3 more
openaire   +1 more source

The magnetocaloric effect on nickel

Journal of Biological Physics, 1981
The 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 ...
openaire   +1 more source

Magnetocaloric effect in manganites

Journal of Experimental and Theoretical Physics, 2012
The magnetocaloric effect (MCE) in La1 − xSrxMnO3, Sm0.55Sr0.45MnO3, and PrBaMn2O6 compounds is studied. The maximum values of MCE (ΔTmax) determined by a direct method in the second and third compositions and in La0.9Sr0.1MnO3 are found to be much lower than those calculated from the change of the magnetic part of entropy in the Curie temperature (TC)
L. I. Koroleva, D. M. Zashchirinskii, A. S. Morozov, R. Szymczak   +3 more
openaire   +1 more source

Review of the magnetocaloric effect in manganite materials

Journal of Magnetism and Magnetic Materials, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Manh‐Huong Phan, Seong‐Cho Yu
openaire   +1 more source