Influence of La and Ce additions on the magnetocaloric effect of Fe–B–Cr-based amorphous alloys

Abstract

Near-room-temperature refrigeration through voltage-controlled entropy change in multiferroics Appl. Phys. Lett. 102, 031915 (2013) Resistivity, specific heat, and magnetocaloric effect of La0.8Ag0.1MnO3: Effect of isotopic substitution of 16O→ 18O Appl. Phys. Lett. 102, 032404 (2013) Giant magnetocaloric effect in Ho12Co7 compound Appl. Phys. Lett. 102, 022421 (2013) Magnetic properties and magnetocaloric effects in Er3−xGdxCo intermetallic compounds J. Appl. Phys. 113, 033908 (2013) Giant magnetocaloric and barocaloric effects in R5Si2Ge2 (R=Tb, Gd)

Achieving table-like magnetocaloric effect and large refrigerant capacity around room temperature in Fe78−xCexSi4Nb5B12Cu1 (x=0–10) composite materials

“…The first value is in good agreement with that reported in reference [18]. It is considered that the tetravalent valence state of Ce ion in Ce-Fe alloys can lead to reduced Fe-Fe distance, which is responsible for the decreased T C [11]. Fig.…”

“…Fig. 4 also shows that the (À ΔS M ) max roughly decreases with increasing Ce content, possibly due to the fact that the localized 4f electron of Ce atom can be easily displaced into the 5d conduction band [11], which results in a further distinct coupling interaction of 5d (Ce)-3d (Fe) and a reduced magnetization in Fe-Ce alloys.…”

“…However, this value has not been reproduced by any other research group. Law et al [11] investigated the rare earth additions to FeBCr amorphous alloy and found that Ce addition monotonically decreases the T C to room temperature (RT) with increasing Ce content from 0 to 15 at%. curve of the composite with xE0.5 was 47% and 29% larger than that of the individual alloys A and B, respectively, and the RC was also greatly improved [12].…”

Scaling and universality in magnetocaloric materials

“…This is certainly a succinct way of summarizing a collection of experimental curves. The approach has been used for a number of different materials, including Gd [10], (Er 1−x Dy x )Al 2 [37], FeMoCuB amorphous alloys [38], hitperm-and nanoperm-type alloys [39,40], and Fe-B-Crbased amorphous alloys [41], and in many cases the rescaled curves for an individual material do collapse onto a single curve.…”

Investigations of the Magnetic Phase Transition in the LaFe_{11.14}Co_{0.66}Si_{1.1}M_{0.1} (Where M~=~Al or Ga) Alloys

“…Besides the listed compounds, Mn- [6], Co- [7], Gd- [8,9] and Fe-based [10][11][12] alloys have been intensively studied. The Fe-based alloys are relatively cheap compared to the above mentioned materials and are characterized by excellent magnetic properties [13][14][15].…”