Detail publikačního výsledku

Observation of Mermin-Wagner behavior in LaFeO3/SrTiO3 superlattices

Kiaba, M.; Suter, A.; Salman, Z.; Prokscha, T.; Chen, B.; Koster, G.; Dubroka, A.

Original Title

Observation of Mermin-Wagner behavior in LaFeO3/SrTiO3 superlattices

English Title

Observation of Mermin-Wagner behavior in LaFeO3/SrTiO3 superlattices

Type

WoS Article

Original 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 contrast, in the superlattices with single LaFeO3 monolayer, the moments do not order and fluctuate to the lowest measured temperature as expected from the Mermin-Wagner theorem. Our work shows how dimensionality can be used to tune the magnetic properties of ultrathin films.

English 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 contrast, in the superlattices with single LaFeO3 monolayer, the moments do not order and fluctuate to the lowest measured temperature as expected from the Mermin-Wagner theorem. Our work shows how dimensionality can be used to tune the magnetic properties of ultrathin films.

Keywords

SPIN RELAXATION; DYNAMICS; RANGE; FILMS; FIELD

Key words in English

SPIN RELAXATION; DYNAMICS; RANGE; FILMS; FIELD

Authors

Kiaba, M.; Suter, A.; Salman, Z.; Prokscha, T.; Chen, B.; Koster, G.; Dubroka, A.

RIV year

2025

Released

22.06.2024

Publisher

NATURE PORTFOLIO

Location

BERLIN

ISBN

2041-1723

Periodical

Nature Communications

Volume

15

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

7

Pages count

7

URL

https://www.nature.com/articles/s41467-024-49518-0

Full text in the Digital Library

http://hdl.handle.net/11012/252555

BibTex

@article{BUT197256,
  author="Michal {Kiaba} and Andreas {Suter} and Zaher {Salman} and Thomas {Prokscha} and B. {Chen} and Gertjan {Koster} and Adam {Dubroka}",
  title="Observation of Mermin-Wagner behavior in LaFeO3/SrTiO3 superlattices",
  journal="Nature Communications",
  year="2024",
  volume="15",
  number="1",
  pages="1--7",
  doi="10.1038/s41467-024-49518-0",
  issn="2041-1723",
  url="https://www.nature.com/articles/s41467-024-49518-0"
}

Documents

s41467-024-49518-0