Fabrication of graphene-oxide/SmFeO3 interfaces by ambient pressure/high-temperature fusion of Fe3C@CNOs with Sm2O3@C-capsules

Vacancy-induced interfacial ferromagnetic features in SmFeO3-filled graphitic carbon foam

“…6B and C), with a magnetization peak at approximately 150 K, which could be ascribed to a transition in the magnetic structure of the SmFeO 3 phase induced by the Sm magnetic moments (antiferromagnetic exchange interaction between the two magnetic sublattices). 17,18 On the basis of the XRD measurements in Fig. 4, no contribution was detected from other iron oxide phases.…”

“…12,13 In addition to these important studies, recent reports have shown that creating direct interfaces between iron-based oxides and carbon materials can allow possible rehybridization effects with signicant benets not only for the control of sp 3 -rich characteristics of the carbon layers but also for applications in electrical-memory devices. [14][15][16][17][18] In this context, rare-earth orthoferrites RFeO 3 (R ¼ rare-earth ion) are a new class of materials with a distorted perovskite Pbnm structure which intrinsically exhibit canted ferromagnetism due to the presence of the 4f-electrons and 3d-electrons sublattices. 19 These materials have recently attracted signicant attention for their important application perspectives in magnetic, ferroelectric and multiferroic devices.…”

“…18 Interestingly, fabrication of monolayer carbon foam (MCFM)/SmFeO 3 interfaces has been recently demonstrated through a novel synthesis route involving high temperature fusion of Fe 3 C lled CNOs with Sm 2 O 3 lled CNOs and subsequent annealing. 17 In fact, up to now, two main methodologies have been reported for the creation of CFM/orthoferrite interfaces, these consist into (1) high temperature fusion of as grown lled CNOs 17 and (2) annealing of as produced metal-lled carbon foam materials with chosen oxides. 18 In those studies, the formation of a SmFeO 3 phase was investigated with major focus on the intrinsic magnetic properties of the orthoferrite.…”

“…However, the structural and magnetic aspects of the residual graphitic carbon layers in direct interfacial contact with the orthoferrite phase were not investigated. 17 Being interested in gaining a better understanding of the defect-richness properties and magnetic characteristic of the interfacial carbon layers in such CFM material, with particular emphasis in the samples produced with method 1, we have performed a novel structural and magnetic investigation by employing high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy (RS), vibrating sample magnetometry (VSM), temperature dependent superconducting quantum interference device magnetometry (T-SQUID) and temperature dependent electron paramagnetic resonance (T-ESR).…”