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Artículo
Universal behavior for magnetic entropy change in magnetocaloric materials: An analysis on the nature of phase transitions
(The American Physical Society, 2010-06-16)
A universal curve for the change in the magnetic entropy has been recently proposed for materials with second-order phase transitions. In this work we have studied the universal behavior of the magnetocaloric effect in the ...
Artículo
Influence of La and Ce additions on the magnetocaloric effect of Fe–B–Cr-based amorphous alloys
(American Institute of Physics, 2011)
The magnetic entropy change (ΔSM), temperature of peak ΔSM (Tpk) and refrigerant capacity (RC) in Fe(RE)80B12Cr8 (RE = La, Ce, or Gd) alloys were studied. Increasing La, Ce, and Gd content led to relatively constant, ...
Artículo
Influence of Hot Compaction on Microstructure and Magnetic Properties of Mechanically Alloyed Fe(Co)-based Amorphous Compositions
(Elsevier, 2015)
Amorphous Fe75Nb10B15 and (Fe70Co30)75Nb10B15 alloys were prepared by mechanical alloying from the elemental constituents and hot compacted at different temperatures within the supercooled liquid region. After compaction, ...
Artículo
FORC study of the ferromagnetic impurities in Na and K feldspars of El Realejo mine
(American Institute of Physics Inc., 2019)
Feldspar is a Na-K-Ca-Al tectosilicate, generally poor in iron or other elements with large magnetic moments. Being the most abundant constituent minerals in Earth’s crust, feldspars are technologically used in a broad ...
Artículo
Analysis of magnetocaloric effect of ball milled amorphous alloys: Demagnetizing factor and Curie temperature distribution
(Elsevier, 2015)
The magnetocaloric effect (MCE) has been measured for an amorphous mechanically alloyed (MA) Co62Nb6Zr2B30. It is demonstrated that sample shape must be taken into account for a correct interpretation of the results, ...
Artículo
Structure and magnetic properties of Fe–Nb–B amorphous/nanocrystalline alloys produced by compaction of mechanically alloyed powders
(AIP Publishing, 2010)
Mechanical alloying of Fe75Nb10B15 and Fe85Nb5B10 systems has been performed from an initial mixture of elemental powders. A bcc supersaturated solid solution is developed during milling for both alloys. However, Fe75Nb10B15 ...
Artículo
Low hysteresis and large room temperature magnetocaloric effect of Gd 5Si2.05-xGe1.95-xNi2x (2x 0.08, 0.1) alloys
(AIP Publishing, 2013-03-18)
Gd5Si2.05-xGe1.95-xNi2x (2x ¼ 0.08, 0.1) alloys were prepared by arc melting followed by annealing at 1273 K for 96 h. Mixed monoclinic Gd5Si2Ge2-type phase, orthorhombic Gd5Si4-type phase, and a small amount of Gd5Si3-type ...
Artículo
Extracting the composition of nanocrystals of mechanically alloyed systems using Mössbauer spectroscopy
(Elsevier, 2014)
Determining the composition at the nanoscale generally requires the use of experimental techniques such as 3D atom probe or nanoanalysis, which have limited availability, involve high economic cost and, moreover, imply ...
Artículo
Scaling Analysis of the Magnetocaloric Effect in Co/Au Nanoparticles
(Panstwowego Wydawnictwa Naukowego, 2017)
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 ...
Artículo
Optimal temperature range for determining magnetocaloric magnitudes from heat capacity
(Institute of Physics Publishing, 2016)
The determination of the magnetocaloric magnitudes (specific magnetic entropy change, Δs M, and adiabatic temperature change, ΔT ad) from heat capacity (c H) measurements requires measurements performed at very low ...