Magnetic phase transitions in Gd3Co

A comparative study of the magnetocaloric effect in Gd3Co and Gd3Ni

“…The sharp maxima correspond to the Neel temperatures (T N ), which have been found to be 128 K and 99 K, respectively, for Gd 3 Co and Gd 3 Ni. These values are also in good agreement with earlier reports [7,8]. Though both of these compounds have AF ordering, a difference is observed in the behavior below the Neel temperature; namely an anomaly in case of Gd 3 Ni.…”

The physical properties of Gd3Ru: A real candidate for a practical cryogenic refrigerator

“…15 Since there is no crystal field effect for Gd, this is probably due to the antiparallel alignment between the M ions induced moment and the R ions moment. 21,22 In Fig. 3, we show the Arrott-Belov plots for Gd 3 Ru where the appearing of negative slopes starting at 54 K confirms the first order character of the FM to paramagnetic transition.…”

Irreversible field-induced magnetic phase transitions and properties of Ho3Co

“…Moreover, some unusual features in the behaviour of the specific heat and electrical properties were observed for R 3 M compounds. In particular, the coefficient of the electronic specific heat for Gd 3 M was found to be about one order higher (γ = 100-170 mJ mol −1 K −2 than that obtained for isostructural Y 3 M compounds (γ = 11-15 mJ mol −1 K −2 ) [9,[21][22][23][24]), while γ -values for pure Gd and Y are close to each other (γ ∼ 6.4 and 7.9 mJ mol −1 K −2 , respectively [25]). The giant enhancement of γ for Gd 3 M cannot be ascribed to a possible contribution from 4f-electrons of Gd to the density of electronic states (DOS) at the Fermi level or to some peculiarities of the electronic structure of Gd 3 M. According to XPS spectroscopy studies [26] the valence bands of R 3 M with other rare-earth elements and yttrium are similar; as with the 4f-states of Gd, they are located far below the Fermi level.…”

“…The measurements of the magnetization, electrical resistivity and specific heat performed for some R 3 Co compounds on polycrystalline samples [3,4] and on single crystals [5][6][7][8][9][10][11][12][13][14][15], as well as neutron diffraction investigation [16][17][18][19][20], have revealed several anomalous features, which may be summarized as follows:…”