Pressure Induced AF - F - AF Magnetic Phase Transformations in Pd Substituted FeRh Compound

Chirkova, I. М.; Волегов, А. С.; Neznakhin, D. S.; Степанова, Е. А.; Баранов, Н. В.

doi:10.4028/www.scientific.net/ssp.190.299

Cited by 7 publications

(3 citation statements)

References 14 publications

(19 reference statements)

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“…The shift of the AFM-FM transition towards lower temperatures than that of Fe 50.4 Rh 49.6 [20,25] respectively, which were very close to room temperature values required in magnetic refrigeration technology. The shift of the transition temperature was in good agreement with previous results [5,6,9,11,13,23,24]. The transition in the Pd-doped samples spread over a wider range in comparison with Fe 50.4 Rh 49.6 [20,25]: full width at half maximum (FWHM) 10 K for Fe 50,4 Rh 49,6 and 12.4 K for Fe 49.7 Rh 47.4 Pd 2.9 and Fe 48.9 Rh 46.8 Pd 4.9 (Fig.…”

Section: Resultssupporting

confidence: 92%

“…The magnetocaloric properties of Pd-doped Fe-Rh alloys Fe 49,7 Rh 47,4 Pd 2.9 , and Fe 48,9 Rh 46,8 Pd 4.9 are studied. It is known that adding Pd leads to a decrease of the FM/AFM transition temperature bringing it closer to room temperature [5,6,9,11,13,23,24]. Thus, the study of such materials is promising from the practical point of view as it allows materials to be prepared which have desirable transition temperature values.…”

Section: Resultsmentioning

confidence: 99%

“…Doping Fe-Rh alloys with Pd, Cu, Co, Ni etc. leads to the shift of the phase transition towards low temperatures [7][8][9][10][11] which is important for medical purposes for example. The idea of this work is to move phase transition temperature around of human body temperature region at saving MCE value.…”

Section: Introductionmentioning

confidence: 99%

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Peculiarities of the magnetocaloric effect in FeRh-based alloys in the vicinity of the first order magnetic phase transition

et al. 2018

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Medical applications of magnetocaloric effect (MCE) require possibility for precision shift of a temperature of the magnetic phase transition at the same MCE value and minimize irreversibility. Thus, detail dynamic MCE investigation of such alloys with non-toxic biocompatible dopants need to be done. In present work, the giant magnetocaloric effect, which is observed in the whole family of Fe-Rh alloys, has been investigated in Pd-doped samples in slowly cycled magnetic fields of up to 1.8 T in magnitude for a range of temperatures, 250 K < T < 350 K. The shift of the ferromagnetic/antiferromagnetic transition temperature down towards room temperature and the decrease in the MCE have been observed in these alloys in comparison with a quasi-equiatomic FeRh alloy. The measurements have also shown an asymmetric behaviour of the first order magnetic phase transition with respect to whether the transition is traversed by heating from lower temperatures or cooling from above. These peculiarities have been explained in the framework of the ab-initio density functional theory-based disordered local moment theory of the MCE. The results have been compared with the those for the non-doped FeRh alloy. Thus features of the first order magnetic phase transition that these alloys have in common have been revealed which enable some predictions to be made appropriate for practical applications.

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