Magnetic properties of Co2TiGa compound

Magnetic properties of ferromagnetic Heusler alloy Co2ZrAl

“…Recently, this T 2 dependence of σ s (T) 2 in a wide temperature range below T C was also observed for Co 2 TiGa [11]. The result of magnetization measurement at 4.2 K for Co 2 ZrAl at various pressures between 0 and 10 kbar is shown in Fig.…”

“…They reported the value of −0.7 K/kbar as dT C /dp, contrary to the result obtained by Kanomata et al [9]. Recently, Sasaki et al [11] found the value of −1.27 K/kbar as dT C /dp for Co 2 TiGa. The importance of the contribution of spin fluctuations was emphasized in understanding the magnetovolume effect of cobalt Heusler alloys [9][10][11].…”

“…The magnetic properties of the weak itinerant ferromagnets such as (Fe, Co)Si, MnSi, Ni-Pt alloy were discussed by using the Takahashi theory [11,[21][22][23][24]. According to the Takahashi theory, the fourth order expression coefficientF 1 of magnetic free energy and the saturation moment p s are expressed by the following equations:…”

“…It should be noted that the value of η for Co 2 ZrAl is almost equal to those of Co 2 TiGa, MnSi and ZrZn 2 . According to the prediction of the Takahashi theory [12] for the weak itinerant ferromagnets, the squared spontaneous magnetization behaves as T 4/3 for small η while, as η The parameters of other typical weak itinerant electron ferromagnets are also summarized from [11] to make a comparison.…”

“…Recently, Sasaki et al [11] found the value of −1.27 K/kbar as dT C /dp for Co 2 TiGa. The importance of the contribution of spin fluctuations was emphasized in understanding the magnetovolume effect of cobalt Heusler alloys [9][10][11]. There is no data on the pressure effect of the spontaneous magnetization for cobalt Heusler alloys, as far as we know.…”