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Ranke, P.J. von; Nóbrega, E.P.; Oliveira, Isaías G. de; Gomes, A. M.; Sarthour, R. S.

doi:10.1103/physrevb.63.184406

Cited by 78 publications

(39 citation statements)

References 24 publications

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“…Recently, theoretical studies on the MCE of RNi 2 ͑R = Er, Ho, Dy, Tb, and Gd͒ compounds have been reported, which suggests that the maximum MCE occurs in HoNi 2 . 15 Experimental investigations carried out in HoNi 2 are in close agreement with the theoretically predicted results. 16,17 These reports have motivated us to focus our studies on the HoNi 2 -based system.…”

Section: Introductionsupporting

confidence: 82%

Anomalous magnetocaloric effect and magnetoresistance inHo(Ni,Fe)2compounds

et al. 2005

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Magnetic, magnetocaloric, and magnetoresistance studies have been carried out on polycrystalline samples of Laves phase compounds Ho͑Ni 1−x Fe x ͒ 2 ͓x = 0, 0.05, and 0.1͔. The magnetocaloric effect in HoNi 2 is found to be maximum near the ordering temperature with values of 7 J mol −1 K −1 and 10.1 K for the isothermal magnetic entropy change and the adiabatic temperature change, respectively, for a field of 50 kOe. With Fe substitution, the temperature variation of magnetocaloric effect shows an additional peak at low temperatures, which is much more pronounced than the peak at the ordering temperature. The origin of the low temperature peak is attributed to the field-induced metamagnetic transition. The magnetoresistance data also seem to support the occurrence of the metamagnetic transition.

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Section: Introductionsupporting

confidence: 82%

Anomalous magnetocaloric effect and magnetoresistance inHo(Ni,Fe)2compounds

et al. 2005

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“…15 The ⌬S M max of RNi 2 compounds, which have ordering temperatures less than 80 K, also lies approximately in the same range. 16 The ⌬S M max of Gd 2 PdSi 3 which is pro- posed as a potential magnetic refrigerant below 40 K is ϳ8 J/kg K ͑for ⌬H = 40 kOe͒. 17 Therefore, a comparison of the ⌬S M max of HoNiAl with that of the potential magnetic refrigerant materials indicates that this material is suitable for the refrigeration applications below 30 K. However, it may be mentioned here that a comparison of mere ⌬S M max values is not sufficient to examine the suitability of magnetic refrigerants.…”

Section: Resultsmentioning

confidence: 99%

“…It has been reported that in the case of DyNiAl the ⌬T ad max values, for ⌬H = 20 and 50 kOe, are 3.5 and 6.8 K, respectively. 5 The ⌬T ad max value, for ⌬H = 50 kOe, of the RNi 2 compounds varies in the range of 3.5-9 K, 16 whereas for ͑Er, Dy͒Al 2 compounds, for the same field change, this value varies between 7 and 11 K. 15 The ⌬T ad max value of GdPd, which is an active magnetic regenerator material used in the low temperature stage of magnetic refrigerators for liquefaction of hydrogen is 8.7 K, for a field change of 70 kOe. 19,20 Therefore, ⌬T ad max value also indicates the suitability of HoNiAl as a low temperature magnetic refrigerant.…”

Section: Resultsmentioning

confidence: 99%

Effect of magnetic polarons on the magnetic, magnetocaloric, and magnetoresistance properties of the intermetallic compound HoNiAl

Singh¹,

Суреш²,

Nirmala³

et al. 2007

Journal of Applied Physics

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The effect of distributed exchange parameters on magnetocaloric refrigeration capacity in amorphous and nanocomposite materials J. Appl. Phys. 111, 07A334 (2012) Particle size dependent hysteresis loss in La0.7Ce0.3Fe11.6Si1.4C0.2 firstorder systems Appl. Phys. Lett. 100, 072403 (2012) Magnetocaloric effect and refrigerant capacity in 0.44, 0.46 The magnetic, magnetocaloric, and magnetoresistive properties of the polycrystalline compound HoNiAl have been studied. The temperature variations of magnetization and heat capacity show that the compound undergoes two magnetic transitions, one at 14 K and the other at 5 K. The former is due to the paramagnetic-ferromagnetic transition, while the latter is attributed to the onset of an antiferromagnetic ordering, as the temperature is lowered. The M-H isotherm obtained at 2 K shows a metamagnetic transition with a critical filed of about 13 kOe. The maximum values of isothermal magnetic entropy change and adiabatic temperature change, for a field change of 50 kOe, are estimated to be 23.6 J / kg K and 8.7 K, respectively. The relative cooling power is found to be about 500 J / kg for a field change of 50 kOe. A large magnetoresistance of about 16%, near the ordering temperature of 14 K, is observed for a field of 50 kOe. The magnetic, magnetocaloric, and magnetoresistance data seem to suggest the presence of magnetic polarons in this compound.

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“…According to von Ranke et al [15][16][17][18], which have investigated the magnetocaloric properties of RNi 2 compounds, − T for a HoNi 2 single crystal is expected to be ∼14 K in a magnetic field of 5 T [18]. The purpose of our present investigation is to check the magnetocaloric effect for the polycrystalline HoNi 2 compound and the associated solid solutions in a relatively low applied magnetic field.…”

Section: Heat Capacitymentioning

confidence: 97%