Enhanced survival of short-range magnetic correlations and frustrated interactions in R3T intermetallics

Field-induced magnetic phase transitions and metastable states in Tb3Ni

“…The saturation of the resistivity observed in numerous R 3 T compounds was also ascribed to the short-range magnetic order persisting up to temperatures well above Néel temperature and s-d scattering mechanism [6,27]. The complex multi-component incommensurate magnetic structures observed in R 3 T with non-Kramers R ion apparently arise from the competition of exchange interactions of different types and lowsymmetry crystal electric field [6,[12][13][14][15].…”

“…The decisive role of the FS geometry in explaining of the complex incommensurate magnetic orders in the ternary rare-earth silicides R 2 PdSi 3 (R = Gd, Tb) and cerium hexaboride CeB 6 has been evidenced by means of magnetic neutron scattering and angle-resolved photoemission spectroscopy spectroscopy [4,5]. Recently, the enhanced short-range antiferromagnetic order persisting in Tb 3 Ni and Gd 3 Ni compounds up to 5-6 times Néel temperature was found to originate from dominance of indirect 4f − 5d − 5d − 4f exchange interaction between neighboring R-ions over RKKY exchange [6].…”

“…Particularly, spin-fluctuations were suggested to be responsible for an enhanced value of the T -linear specific heat coefficient (γ = 118 mJ mol −1 K −2 for Gd 3 Rh [23] and γ = 86 mJ mol −1 K −2 for Gd 3 Ni [24]) as well as for the tendency to saturation of the electrical resistivity in paramagnetic state [25,26]. The saturation of the resistivity observed in numerous R 3 T compounds was also ascribed to the short-range magnetic order persisting up to temperatures well above Néel temperature and s-d scattering mechanism [6,27]. The complex multi-component incommensurate magnetic structures observed in R 3 T with non-Kramers R ion apparently arise from the competition of exchange interactions of different types and lowsymmetry crystal electric field [6,[12][13][14][15].…”

Effect of rapid quenching on the magnetic state, electrical resistivity and thermomagnetic properties of Gd3Co

“…As is seen, the substantial magnetic contribution to the specific heat persists above magnetic ordering temperatures in both crystalline and amorphous Gd 3 Co samples, which is associated with the presence of short-range magnetic order in the paramagnetic state. It is worth to mention, that for the crystalline compounds Tb 3 Co and Tb 3 Ni, the persistence of short-range magnetic correlations up to temperatures greater than 5e6 times the Neel temperatures was revealed by neutron diffraction measurements [30].…”

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

“…The crystallographic structure of the R 3 M can be described by slanted layers of R ions separated by the M ions. According to this model, 26 the competition between the Gd(4f-5d)-(5d-4f)Gd intra layer interaction and the inter layer interaction, mediated by the Gd(4f-5d)-(4d)Ru path, will affect the ordering temperature as well as the type of ordering. Indeed, the Neel temperature sequential decrease for Gd 3 M, M ¼ Co, Rh, and Ni, with the corresponding increase of the excess moment (see Table I), indicates that the inter layer interaction is more effective for M ¼ Ni.…”