Linear and nonlinear ac susceptibility of the canted-spin system: Ce(Fe0.96Al0.04

Abstract

The linear and nonlinear ac susceptibilities of the canted-spin system Ce(Fep. gsAlp. p4)g have been measured using the mutual-inductance-bridge method as a function of temperature (50 -100 K), frequency (19 -1370 Hz) with different static biasing fields (12 -36 Oe) as well as ac fields in the range of 4 to 24 Oe. An attempt has been made to compare the "canted-spin" system with the so-called "reentrant spin-glass system" from the ac-susceptibility point of view, since the "canting" plays a significant role in the reentrant spin-glass system, below the Curie temperature.

Lattice expansion and noncollinear to collinear ferrimagnetic order in aMnCr2O4nanoparticle

“…Neutron diffraction experiment confirmed the noncollinear spin structure between B site Cr 3+ moments in chromites [8], including MnCr 2 O 4 [9]. The neutron experiment shows that the decrease of magnetization in MnCr 2 O 4 below 18 K, though identical with re-entrant magnetic transition [10], originates from the occuring of non-collinear spin structure in MnCr 2 O 4 . Numerous attempts have been made to bridge the gap between ferrites (MFe 2 O 4 ), which are collinear ferrimagnet, and chromites, which are non-collinear ferrimagnet.…”

Coexistence of ferromagnetic and glassy behavior in semiconducting LaNi0.2Co0.8O3

“…It has been shown that for a spin glass 3 diverges at T f and is negative as h→0, regardless of the theoretical description of the freezing, i.e., a phase transition in the Anderson-Edwards model or progressive freezing of the moments of superparamagnetic clusters. [15][16][17] As it can be observed in Fig. 6, 3 exhibits a nondiverging broad peak at ϳ38 K, while 2 also shows a broad peak at around the same temperature.…”

Coexistence of ferromagnetism and cluster-glass behavior in YFe5.5Al6.5 and YFe5.8Al6.2

“…Therefore, in the case of glassy behavior only odd harmonics are expected [23] while for a ferro-or ferrimagnet, both even and odd harmonics should be present [24,25]. The dependence in temperature of χ 2 (T) shows two peaks, at approximately 227 and 257 K for x = 5.5 and 5.8, respectively, and above the room temperature at approximately 325 K for both samples.…”