Possible double magnetic phase transition in

Role of Fe substitution on the anomalous magnetocaloric and magnetoresistance behaviour in Tb(Ni1−xFex)2compounds

“…We attribute this to the presence of spin fluctuations, as mentioned earlier. A similar behaviour has been reported in other intermetallic compounds as well [18]. The fact that the MR at 10 kOe is appreciable only in the vicinity of T C may be due to the competing effect from the positive Lorentz force contribution and the negative spin fluctuation contribution.…”

“…It may be recalled here that the temperature variation of heat capacity data of TbNi 2 is also indicative of the presence of spin fluctuations just above T C . Such a resistivity behaviour has been observed in other intermetallic compounds as well [18].…”

“…This may be attributed to the spin fluctuations, arising from the presence of magnetic polarons, above T C . Such a behavior has been observed in other intermetallic compounds also [17,18]. However, in the iron substituted compounds no peak in heat capacity could be seen even in zero field (inset in Figure 5).…”

“…Such a behavior is generally expected in antiferromagnetic materials [25]. However, in TbNi 2 , this behavior of the resistivity well [18]. The fact that the MR at 10 kOe is appreciable only in the vicinity of T C may be due to the competing effect from the positive Lorentz force contribution and the negative spin fluctuation contribution.…”

Coexistence of localized magnetism and itinerant ferromagnetism in a Gd5Y2Pd3 single crystal

“…A maximum usually appears in the r(T)-curves of spin-glasses or materials with crystallographic disorder [19], and finally a maximum in the resistivity near the Curie temperatures was also found in metallic RNi 5 [20] and Dy 5 CuPb 3 [21] compounds. In the latter ferromagnets, the fluctuation time of magnetic moments is believed to be comparable to the relaxation time of conduction electrons.…”