Specific heat of the Gd3Co and Gd3Ni compounds

Tristan, N.; Никитин, С.А.; Palewski, Т.; Nenkov, K.; Skokov, Konstantin P.

doi:10.1016/s0304-8853(02)01160-5

Cited by 17 publications

(13 citation statements)

References 5 publications

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“…The MCE properties of Nd 2 Fe 17 (T C = 325 K) were determined by Dan'kov et al [59], see table 2: the S M was slightly smaller than those of the Si-rich Gd 5 (Si 1−x Ge x ) 4 alloys (figure 3) and T ad was significantly smaller (see figure 4). The T ad value of 5 K for Gd 3 Co at T C = 135 K for H = 40 kOe [71] is rather modest compared with other materials which have comparable T C s, see figure 4.…”

Section: Binary Compounds Nakagawa Et Almentioning

confidence: 77%

Recent developments in magnetocaloric materials

2005

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The recent literature concerning the magnetocaloric effect (MCE) has been reviewed. The MCE properties have been compiled and correlations have been made comparing the behaviours of the different families of magnetic materials which exhibit large or unusual MCE values. These families include: the lanthanide (R) Laves phases (RM 2 , where M = Al, Co and Ni), Gd 5 (Si 1−x Ge x) 4 , Mn(As 1−x Sb x), MnFe(P 1−x As x), La(Fe 13−x Si x) and their hydrides and the manganites (R 1−x M x MnO 3 , where R = lanthanide and M = Ca, Sr and Ba). The potential for use of these materials in magnetic refrigeration is discussed, including a comparison with Gd as a near room temperature active magnetic regenerator material.

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Section: Binary Compounds Nakagawa Et Almentioning

confidence: 77%

Recent developments in magnetocaloric materials

2005

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“…It may be noted that the magnetic correlations develop on cooling the sample and at about 14 K a ferromagneticlike transition takes place, which is in good agreement with the previous reports. 16,17 The M͑T͒ data collected under ZFC and FC protocols show irreversibility. It is well known that the thermomagnetic irreversibility between the ZFC and FC M͑T͒ data is a typical feature associated with spin glass system; however, it may also be observed in ferromagnetic materials having large anisotropy, in materials with coexisting ferromagnetic and antiferromag-netic interactions.…”

Section: Methodsmentioning

confidence: 98%

“…In general, the R 3 Co compounds crystallize in the Fe 3 C-type orthorhombic structure ͑space group Pnma͒ which is described by trigonal prisms with the corners occupied by R atoms and the center by a Co atom. 6,[15][16][17][18][19] The previous studies have shown that owing to the filling of the 3d band of Co by 6s and 5d electrons of R atoms, the Co sublattice is nearly nonmagnetic; however, the partial polarization of 3d band by the rare earth exchange field can lead to small moment at the Co site. 15,20 Thus, the magnetic ordering of R 3 Co compounds results from indirect interactions between R atoms through the conduction electrons.…”

Section: Introductionmentioning

confidence: 99%

Large reversible magnetocaloric effect in Er3Co compound

Kumar

Singh

Nayak

et al. 2010

Journal of Applied Physics

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Magnetic and magnetocaloric properties of the intermetallic compound Er 3 Co have been studied. Temperature dependence of magnetization data shows that it exhibits ferromagneticlike bulk magnetic ordering at 14 K. For field changes ͑⌬H͒ of 20 and 50 kOe, the maximum values of isothermal magnetic entropy change are found to be 9 and 17 J/kg K, respectively. For ⌬H = 20 and 50 kOe, the relative cooling powers are found to be 140 and 450 J/kg, respectively. At temperatures above T ord , the spin fluctuations are found to affect the magnetocaloric properties of Er 3 Co.

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“…Recently, there has been a vigorous activity in the development of magnetocaloric materials, which are the active materials in magnetic refrigerators [1][2][3][4][5][6][7][8][9][10]. The magnetocaloric effect (MCE) manifests itself as the isothermal magnetic entropy change, S M , or as the adiabatic temperature change, T ad , of a magnetic material when exposed to a magnetic field.…”

Section: Introductionmentioning

confidence: 99%