AUTHOR=Stiller Markus , Esquinazi Pablo D. 

TITLE=Defect-induced magnetism in TiO2: An example of quasi 2D magnetic order with perpendicular anisotropy

JOURNAL=Frontiers in Physics

VOLUME=Volume 11 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2023.1124924

DOI=10.3389/fphy.2023.1124924

ISSN=2296-424X

ABSTRACT=Magnetic order at room temperature induced by atomic lattice defects,
like vacancies, interstitials or pairs of them, has been observed in a
large number of different nonmagnetic hosts, such as pure graphite,
oxides and silicon-based materials. High Curie temperatures and time
independent magnetic response at room temperature indicate the
extraordinary robustness of this new phenomenon in solid state
magnetism. In this work, we review experimental and theoretical
results in pure TiO$_2$ (anatase), which magnetic order can be
triggered by low-energy ion irradiation. In particular, we discuss the
systematic observation of an ultrathin magnetic layer with
perpendicular magnetic anisotropy at the surface of this oxide.