Alloys of the FeRh system as a new class of working material for magnetic refrigerators

Annaorazov, M.P.; Asatryan, K.A.; Myalikgulyev, G.; Никитин, С.А.; Tishin, A.M.; Tyurin, A.L.

doi:10.1016/0011-2275(92)90352-b

Cited by 200 publications

(122 citation statements)

References 11 publications

Supporting

Mentioning

113

Contrasting

Unclassified

Order By: Relevance

“…1) Various performance-enhancing MCMs such as La(FexSi1-x)13Hy, 2) MnFe(P,Si), 3) and so on have been found so far. Inverse magnetocaloric materials (IMCMs) such as FeRh 4) and Mn2-xCrxSb 5) have also been the focus of attention because of the appearance of the 'giant' inverse magnetocaloric effect (IMCE) under a low magnetic field. In particular, FeRh shows a first-order antiferromagnetic (AFM)-ferromagnetic (FM) phase transition at Ttr ≈ 320 ~ 370 K without a magnetic field and exhibits a giant adiabatic temperature change ΔTad (= 13 K) under 1.95 T. Recent studies suggest that ΔTad can be increased up to 18 K per 1 T. 6) The appearance of new MCMs and IMCMs that are superior to FeRh is now expected.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation on Electronic and Magnetic Structures of FeRh

et al. 2016

View full text Add to dashboard Cite

In order to clarify the mechanism behind antiferromagnetic (AFM)-ferromagnetic (FM) phase transition, we investigate the electronic and magnetic structures of FeRh by using first principles calculations with the GGA + U method. By choosing the appropriate values of the on-site Coulomb interaction (U) of Fe3d and Rh4d electrons, we succeed in explaining the reported AFM-FM phase transition experiments for the first time by obtaining the total energy difference between the AFM and FM states (ΔE). Other physical quantities such as the density of states (DOS) are also consistent with experimental reports.

show abstract

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation on Electronic and Magnetic Structures of FeRh

et al. 2016

View full text Add to dashboard Cite

show abstract

“…In Fe-Rh a giant magnetocaloric effect was first reported in the early nineties 25,26 , prior to the seminal work on the giant magnetocaloric effect in Gd-Si-Ge 27 that boosted the research in the field. However, Fe-Rh was considered to be of no practical use because the effect was believed to be irreversible in an alternating magnetic field and even to disappear after a few cycles [28][29][30] .…”

Section: Introductionmentioning

confidence: 99%

Barocaloric and magnetocaloric effects inFe49Rh51

et al. 2014

View full text Add to dashboard Cite

We report on calorimetry under applied hydrostatic pressure and magnetic field at the antiferromagnetic (AFM)-ferromagnetic (FM) transition of Fe 49 Rh 51 . Results demonstrate the existence of a giant barocaloric effect in this alloy, a new functional property that adds to the magnetocaloric and elastocaloric effects previously reported for this alloy. All caloric effects originate from the AFM/FM transition which encompasses changes in volume, magnetization and entropy.The strong sensitivity of the transition temperatures to both hydrostatic pressure and magnetic field confers to this alloy outstanding values for the barocaloric and magnetocaloric strengths (|∆S|/∆p ∼ 12 J kg −1 K −1 kbar −1 and |∆S|/µ 0 ∆H ∼ 12 J kg −1 K −1 T −1 ). Both barocaloric and magnetocaloric effects have been found to be reproducible upon pressure and magnetic field cycling. Such a good reproducibility and the large caloric strengths make Fe-Rh alloys particularly appealing for solid-state cooling technologies at weak external stimuli.

show abstract

“…Apart from Gd 5 (Si x Ge 1−x ) 4 , other known systems with considerable MCE values around room temperature include lanthanum manganese perovskite oxides [7], transition metal based alloys [8,9], Heusler alloys [10][11][12] and 3d transition metal rich systems with values comparable to those of Gd [13,14]. These results including MnFeP 1−x As x system exhibiting reversible giant magnetic entropy change with the same magnitude as Gd 5 Si 2 Ge 2 [15] renewed interest in materials exhibiting considerable magnetic entropy change at temperatures corresponding to their first order magnetic transitions [15,16].…”

Section: Introductionmentioning

confidence: 99%

Effect of composition on magnetocaloric properties of Mn3Ga(1−x)SnxC

Dias

Priolkar

Çakιr

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

A study investigating the effect of Sn substitution on the magnetocaloric properties of Mn3Ga (1−x) SnxC compounds reveals that nature of the MCE has a strong dependence on the nature of the magnetic ordering. For small amounts of Sn (x ≤ 0.2) the MCE is of the inverse type wherein an increase in the applied field beyond 5T gives rise to a table like temperature dependence of the entropy due to a coupling between the first order FM -AFM transition and the field induced AFM -FM transition. Replacement of Ga by larger concentrations of Sn (x ≥ 0.71) (∆SM ) results in a change of the MCE to a conventional type with very little variation in the position of (∆SM )max with increasing magnetic field. This has been explained to be due to the local strain introduced by A site ions (Ga/Sn) which affect the magnetostructural coupling in these compounds.

show abstract

Alloys of the FeRh system as a new class of working material for magnetic refrigerators

Cited by 200 publications

References 11 publications

Theoretical Investigation on Electronic and Magnetic Structures of FeRh

Theoretical Investigation on Electronic and Magnetic Structures of FeRh

Barocaloric and magnetocaloric effects inFe49Rh51

Effect of composition on magnetocaloric properties of Mn3Ga(1−x)SnxC

Contact Info

Product

Resources

About