Giant reversible magnetocaloric effect in a multiferroic GdFeO3 single crystal

Spin quantum well-like behavior in single-crystal Gd0.75La0.25FeO3

“…The similar shapes and data values of ZFC and FC curves ( Fig. 2a) indicate that Gd 0.75 La 0.25 FeO 3 is not sensitive to the initial cooling process, different from other reported ABO 3 orthoferrites [6,10,20]. The spin ordering temperature (Néel temperature (T N )) of the Gd sublattice is 3 K, while the Fe sublattice shows an AFM ordering ( T N Fe =695 K) with a wFM of 0.06 μ B per formula unit (f.u.)…”

“…In this paper, we prepared a high-quality single-crystal of Gd 0.75 La 0.25 FeO 3 and investigated its magnetic properties from 2 K to room temperature. Different from other RFeO 3 orthoferrites (R = rare earth, such as Gd [6], La [7], Er [8], Sm [9,10], and Tm [11]), the weak-ferromagnetic (wFM) moments of the singlecrystal of Gd 0.75 La 0.25 FeO 3 are discrete and have only two states: the same in magnitude but in opposite direction along the ferromagnetic axis, thus being not able to rotate randomly. The AFM coupling between Gd and Fe sublattices is broken in Gd 0.75 La 0.25 FeO 3 , which leads to a spin-flip.…”

“…, Shunquan Liu 1,4 , Honglin Du 1,4 , Shixun Cao 5 , Jinxing Zhang 2 , Xiangqun Zhang 6 , Zhaohua Cheng 6 , Yanglong Hou 4,7* and Jinbo Yang 1,5*…”

Spin reorientation and metamagnetic transitions in RFe0.5Cr0.5O3Bolletta1, Pomiro2, Sánchez3 et al. 2018Phys. Rev. B4912352View full textAdd to dashboardCite

“…However, it is important to note that this is not always the case. Some RMO 3 perovskites with paramagnetic R 3+ cations do not display a spin reorientation transition, e.g., GdFeO 3 and TbCrO 3 [12,31]. As it was mentioned before, there are also cases where R 3+ is diamagnetic, but the SR transition is caused by the magnetic anisotropy contribution of an M 3+ cation, e.g., Mn 3+ in YFe 1−x Mn x O 3 [8].This highlights the uniqueness of each R 3+ -M 3+ exchange interaction, and shows how mixtures of multiple cations will result in even more complex magnetic behaviors.…”

“…Various other striking properties have been observed in related orthochromites and orthoferrites including magnetocaloric effects [9][10][11][12], magnetization reversal [13,14], negative thermal expansion [14], and diverse magnetoelectric effects [11,[15][16][17]. All these properties are highly dependent on magnetic interactions between the involved cations [18].…”