Magnetoelastic transition and magnetocaloric effect in induction melted Fe100−xRhx bulk alloys with x = 50, 51

Arreguín-Hernández, M. L.; Sánchez-Valdés, C.F.; Llamazares, J. L. Sánchez; Rı́os-Jara, D.; Pecharsky, V. K.; Blinov, Mikhail; Прудников, В. В.; Kovalev, B. B.; Zverev, V. I.; Tishin, A.M.

doi:10.1016/j.jallcom.2021.159586

Cited by 17 publications

(8 citation statements)

References 28 publications

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“…The transition temperature ( T t ) determined from the peak value of the d M /d T – T curve (inset of Figure a) in the heating process under a magnetic field of 2 T is 370 K. As the magnetic field increases, the transition temperature almost linearly moves to a lower temperature at a rate of 8 K/T (see Supporting Information S2). Thus, the phase transition temperature at the zero magnetic field can be determined to be 386 K by linear extrapolation, which is higher than that of monophase FeRh alloys with the same nominal composition in previous refs and . In addition, the full-width (∼11 K) at half-maximum of the d M /d T – T curve, as shown in the inset of Figure a, is larger than that in the literature, , indicating a broadened phase transition in FeRh alloys with second phases.…”

Section: Results and Discussionmentioning

confidence: 57%

Enhanced Performance of ΔT_ad upon Frequent Alternating Magnetic Fields in FeRh Alloys by Introducing Second Phases

Qiao

Wang

Zuo

et al. 2022

ACS Appl. Mater. Interfaces

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The cyclability and frequency dependence of the adiabatic temperature change (ΔT ad ) under an alternating magnetic field (AMF) are significantly important from the viewpoint of refrigeration application. Our studies demonstrated, by direct measurements, that the cyclability and low-magnetic-field performance of ΔT ad in FeRh alloys can be largely enhanced by introducing second phases. The ΔT ad under a 1.8 T, 0.13 Hz AMF is reduced by 14%, which is much better than that (40−50%) of monophase FeRh previously reported. More importantly, the introduction of second phases enables the antiferromagnetic−ferromagnetic phase transition to be driven by a lower magnetic field. Thus, ΔT ad is significantly enhanced under a 0.62 T, 1 Hz AMF, and its value is 70% larger than that of monophase FeRh previously reported. Although frequency dependence of ΔT ad occurs, the specific cooling power largely increases by 11 times from 0.17 to 1.9 W/g, as the frequency increases from 1 to 18.4 Hz under an AMF of 0.62 T. Our analysis of the phase transition dynamics based on magnetic relaxation measurements indicates that the activation energy barrier is lowered owing to the existence of second phases in FeRh alloys, which should be responsible for the reduction of the driving field. This work provides an effective way to enhance the cyclability and lowmagnetic-field performance of ΔT ad under an AMF in FeRh alloys by introducing second phases.

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Section: Results and Discussionmentioning

confidence: 57%

Enhanced Performance of ΔT_ad upon Frequent Alternating Magnetic Fields in FeRh Alloys by Introducing Second Phases

Qiao

Wang

Zuo

et al. 2022

ACS Appl. Mater. Interfaces

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“…The calculation shows that in the PM phase the irradiated surface heats up only ∼1160 K, which would not explain the physical damage in the film. However, if the sample undergoes A1 PM-B2 PM phase transition (As we assumed earlier) the temperature can raise to ∼1800 K which is close to the melting point of this alloy (~1915 K [38]). In previous cases (S1, S2) the ablation could be easily explained by the vaporization of the material but, in this case (S3), the transferred energy does not support this mechanism.…”

Section: Resultsmentioning

confidence: 62%

Laser irradiation effects in FeRh thin film

Merkel

Sájerman

Lenk

et al. 2023

Mater. Res. Express

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The effect of laser irradiation in the energy range from 20 mW to 200 mW was investigated in 109 nm thick Fe51Rh49 film deposited on an MgO (100) substrate. The initial, A1 structure with fully paramagnetic magnetic ordering was achieved after irradiating the samples with 120 keV Ne+ ions with a fluence of 1 × 1016 ion/cm2, as it was confirmed by conversion-electron Mössbauer spectroscopy. At higher powers physical damage of the layer was observed, while in the lowest power case, magnetic force microscopy revealed a well-defined magnetic structure reflecting the laser irradiation pattern. The presented results have the potential to be employed for laser ablation or allows the fabrication of arbitrary ferromagnetic pattern within a homogeneous paramagnetic FeRh thin films.

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“…Since synthesizing the FeRh single-phase samples is challengeable [37,44,45], a method of sample preparation using arc melting was developed, which makes it possible to minimize the phase with B1-type structure content in the sample. Alloys with the compositions of Fe 50 Rh 50 , Fe 50 Rh 47 Pd 3 and Fe 50 Rh 45 Pd 5 were synthesized by arc melting in an argon atmosphere.…”

Section: Methodsmentioning

confidence: 99%

Correlation between magnetic and crystal structural sublattices in palladium-doped FeRh alloys: Analysis of the metamagnetic phase transition driving forces

Komlev

Karpenkov

Gimaev

et al. 2022

Journal of Alloys and Compounds

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Magnetoelastic transition and magnetocaloric effect in induction melted Fe100−xRhx bulk alloys with x = 50, 51

Cited by 17 publications

References 28 publications

Enhanced Performance of ΔT_ad upon Frequent Alternating Magnetic Fields in FeRh Alloys by Introducing Second Phases

Enhanced Performance of ΔT_ad upon Frequent Alternating Magnetic Fields in FeRh Alloys by Introducing Second Phases

Laser irradiation effects in FeRh thin film

Correlation between magnetic and crystal structural sublattices in palladium-doped FeRh alloys: Analysis of the metamagnetic phase transition driving forces

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Magnetoelastic transition and magnetocaloric effect in induction melted Fe100−xRhx bulk alloys with x = 50, 51

Cited by 17 publications

References 28 publications

Enhanced Performance of ΔTad upon Frequent Alternating Magnetic Fields in FeRh Alloys by Introducing Second Phases

Enhanced Performance of ΔTad upon Frequent Alternating Magnetic Fields in FeRh Alloys by Introducing Second Phases

Laser irradiation effects in FeRh thin film

Correlation between magnetic and crystal structural sublattices in palladium-doped FeRh alloys: Analysis of the metamagnetic phase transition driving forces

Contact Info

Product

Resources

About

Enhanced Performance of ΔT_ad upon Frequent Alternating Magnetic Fields in FeRh Alloys by Introducing Second Phases

Enhanced Performance of ΔT_ad upon Frequent Alternating Magnetic Fields in FeRh Alloys by Introducing Second Phases