Observation of Mermin-Wagner behavior in LaFeO₃/SrTiO₃ superlattices.

ABSTRACT: Two-dimensional magnetic materials can exhibit new magnetic properties due to the enhanced spin fluctuations that arise in reduced dimension. However, the suppression of the long-range magnetic order in two dimensions due to long-wavelength spin fluctuations, as suggested by the Mermin-Wagner theorem, has been questioned for finite-size laboratory samples. Here we study the magnetic properties of a dimensional crossover in superlattices composed of the antiferromagnetic LaFeO₃ and SrTiO₃ that, thanks to their large lateral size, allowed examination using a sensitive magnetic probe - muon spin rotation spectroscopy. We show that the iron electronic moments in superlattices with 3 and 2 monolayers of LaFeO₃ exhibit a static antiferromagnetic order. In contras

SUBMITTER: Kiaba M 

PROVIDER: S-EPMC11192889 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature