Results 161 to 170 of about 12,197 (208)

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

Magnetocaloric Effect in Dysprosium

Journal of Applied Physics, 1965
The magnetocaloric effect and magnetization of a polycrystalline ellipsoid of dysprosium were measured in magnetic fields up to 20 kOe from the temperature of liquid nitrogen to room temperature. Dysprosium exhibits both heating and cooling upon adiabatic magnetization depending on its magnetic state (ferromagnetic, paramagnetic, or antiferromagnetic ...
A. C. Hudgins, A. S. Pavlovic
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 Of Ferromagnetic Particles

[1993] Digests of International Magnetics Conference, 1993
The entropy change accompanying the removal of an applied magnetic field (i.e. the magnetocaloric effect) is calculated for a system of magnetic spins independent of each other and also clustered together into independently acting magnetic particles. Mean-field-theory calculations are made for interacting, single magnetic spins and also for interacting,
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

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 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

Engineering molecular rings for magnetocaloric effect

Applied Physics Letters, 2004
By substituting one Cr3+(s=3/2) with Cd2+(s=0) in molecular octanuclear rings, a diluted ensemble of identical nanomagnets with a S=3/2 ground state, weakly split in zero field, is obtained. The lattice contribution and the essential parameters of the spin Hamiltonian of these uncompensated antiferromagnetic cyclic spin systems are determined by ...
Affronte M, Ghirri A, Carretta S, Amoretti G, Piligkos S, Winpenny REP, Timco GA   +6 more
openaire   +3 more sources

Simple enhancement of the magnetocaloric effect in giant magnetocaloric materials

Applied Physics Letters, 2003
A 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
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