Tailoring the magnetic ordering of the Cr₄O₅/Fe(001) surface via a controlled adsorption of C₆₀ organic molecules

Abstract

We analyze the spinterface formed by C60 on Cr4O5/Fe(001) surface showing that the controlled adsorption of C60 molecules can induce FM or AFM magnetic patterning of the Cr atoms in the oxide layer.

Observation of a Metastable Honeycomb Arrangement of C60 on Ni(111) with (7 × 7) Periodicity: Tailoring an Interface for Organic Spintronics

“…During the past decades, ordered overlayers of C 60 fullerene molecules self-assembled on metallic substrates have been the subject of many theoretical and experimental studies. − Such investigations have been motivated by the need to understand the fundamental physical and chemical properties of such systems as well as by the increasing interest in several possible applications that could be derived from them. − Fullerenes are indeed currently employed in electronics, photovoltaics, and medical applications, also because of the opportunities offered by either doping or functionalizing the molecules. − …”

Enhancement of Magnetic Stability in Antiferromagnetic CoO Films by Adsorption of Organic Molecules

“…For example, it is responsible for the generation of spin polarization in the molecules , and for the change of the magnetic behavior of the ferromagnetic (FM) layer. , An emblematic example is provided by the adsorption of buckminster fullerene molecule (C 60 ) onto a cobalt (Co) layer: as a result of hybridization between metallic d z 2 and carbon p z orbitals, the Co layer acquires an out-of-plane interfacial anisotropy that is able to give rise to a spin reorientation transition from in-plane to out-of-plane magnetization. Hybridization effects have been widely investigated both theoretically and experimentally considering FM metallic layers − while the adsorption and coupling of molecules on oxide surfaces with antiferromagnetic (AF) order have not been elucidated yet. − The investigation of such effects on systems featuring complex spin configurations allows thus to enrich our fundamental knowledge of spinterfaces and also to explore the possibility of tuning with molecules some intrinsic AF properties such as ultra-fast magnetization dynamics and magnon-mediated spin transport . In this view, because of the insensitivity of AF to the external magnetic field and with the aim of evidencing the effect of coupling between AF and organics, we have considered the AF layer also coupled to an FM featuring thus an exchange bias (EB) effect.…”