Magnetic-phase transitions and magnetocaloric effects

Tegus, O.; Brück, E.; Zhang, L; Dagula,; Buschow, K.H.J.; Boer, F.R. de

doi:10.1016/s0921-4526(02)01119-5

Cited by 330 publications

(240 citation statements)

References 27 publications

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“…The fieldinduced entropy change ⌬S around the martensitic transition temperature can be estimated from magnetization measurements by employing the Maxwell equation 21 …”

Section: Magnetocaloric Effectmentioning

confidence: 99%

“…When a field of sufficient strength is applied at a temperature corresponding initially to the austenitic state, the shift in all characteristic temperatures ͑there-fore the shift in the hysteresis associated with the transformation͒ can be large enough so that the martensitic state is stabilized. However, experiments performed in fields up to 10 T have shown that in the case of Ni 54 Mn 21 Ga 25 the rate of shift is only about ϳ1 KT −1 . 8 Neutron-diffraction experiments under magnetic field on an alloy with similar composition confirm these results.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In

et al. 2007

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Applying a magnetic field to a ferromagnetic Ni 50 Mn 34 In 16 alloy in the martensitic state induces a structural phase transition to the austenitic state. This is accompanied by a strain which recovers on removing the magnetic field, giving the system a magnetically superelastic character. A further property of this alloy is that it also shows the inverse magnetocaloric effect. The magnetic superelasticity and the inverse magnetocaloric effect in Ni-Mn-In and their association with the first-order structural transition are studied by magnetization, strain, and neutron-diffraction studies under magnetic field.

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“…The fieldinduced entropy change ⌬S around the martensitic transition temperature can be estimated from magnetization measurements by employing the Maxwell equation 21 …”

Section: Magnetocaloric Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In

et al. 2007

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“…Magnetic refrigeration based on magnetocaloric effect (MCE), is an isothermal magnetic-entropy change (-ΔSm) or an adiabatic temperature change (ΔTad) for a magnetic material upon application of a magnetic field [4]. The current investigation of the room temperature MCE mainly focuses on the first-order magnetic phase transition (FOMT) materials, such as Gd5(Ge1-xSix)4, La(Fe1-xSix) 13 and their related compounds, MnAs1-xSbx, MnFeP1-xAsx and MnCoGeBx [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, magnetic and magnetocaloric properties of Fe2–x Mn x P0.4Si0.6 alloys

et al. 2016

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“…In their other paper, the authors have shown an impact of changing P/As ratio on the Curie temperature and magnetic entropy change [2]. In further studies arsenic was substituted for germanium, which caused a drop in the MCE and an increase in T c [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of changing P/Ge and Mn/Fe ratios on the magnetocaloric effect and structural transition in the (Mn,Fe)2 (P,Ge) intermetallic compounds

Włodarczyk

Hawełek

Zackiewicz

et al. 2016

Materials Science-Poland

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The magnetocaloric effect in the Mn x Fe 2 − x P 1 − y Ge y intermetallic compounds with the amount of Mn in the range of x = 1.05 to 1.17 and amount of Ge in the range of y = 0.19 to 0.22 has been studied. It was found that a higher Ge/P ratio causes an increase in Curie temperature, magnetocaloric effect at low field (up to 1 T), activation energy of structural transition and a decrease in thermal hysteresis, as well as transition enthalpy. Contrary to this observation, higher Mn/Fe ratio causes a decrease in Curie temperature, slight decrease of magnetocaloric effect at low magnetic field, and an increase in thermal hysteresis. Simultaneous increase of both ratios may be very advantageous, as the thermal hysteresis can be lowered and magnetocaloric effect can be enhanced without changing the Curie temperature. Some hints about optimization of the composition for applications at low magnetic fields (0.5 T to 2 T) have been presented.

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Magnetic-phase transitions and magnetocaloric effects

Cited by 330 publications

References 27 publications

Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In

Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In

Microstructure, magnetic and magnetocaloric properties of Fe2–x Mn x P0.4Si0.6 alloys

Effect of changing P/Ge and Mn/Fe ratios on the magnetocaloric effect and structural transition in the (Mn,Fe)2 (P,Ge) intermetallic compounds

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