Emergent Magnetic Phases in Pressure-Tuned van der Waals Antiferromagnet FePS_{3}

Layered van der Waals 2D magnetic materials are of great interest in fundamental condensed-matter physics research, as well as for potential applications in spintronics and device physics. We present neutron powder diffraction data using new ultrahigh-pressure techniques to measure the magnetic stru...

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Autores principales: Matthew J. Coak, David M. Jarvis, Hayrullo Hamidov, Andrew R. Wildes, Joseph A. M. Paddison, Cheng Liu, Charles R. S. Haines, Ngoc T. Dang, Sergey E. Kichanov, Boris N. Savenko, Sungmin Lee, Marie Kratochvílová, Stefan Klotz, Thomas C. Hansen, Denis P. Kozlenko, Je-Geun Park, Siddharth S. Saxena
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Publicado: American Physical Society 2021
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spelling oai:doaj.org-article:fcec1e79eb7648c68793eb997239cbfd2021-12-02T14:11:19ZEmergent Magnetic Phases in Pressure-Tuned van der Waals Antiferromagnet FePS_{3}10.1103/PhysRevX.11.0110242160-3308https://doaj.org/article/fcec1e79eb7648c68793eb997239cbfd2021-02-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.011024http://doi.org/10.1103/PhysRevX.11.011024https://doaj.org/toc/2160-3308Layered van der Waals 2D magnetic materials are of great interest in fundamental condensed-matter physics research, as well as for potential applications in spintronics and device physics. We present neutron powder diffraction data using new ultrahigh-pressure techniques to measure the magnetic structure of Mott-insulating 2D honeycomb antiferromagnet FePS_{3} at pressures up to 183 kbar and temperatures down to 80 K. These data are complemented by high-pressure magnetometry and reverse Monte Carlo modeling of the spin configurations. As pressure is applied, the previously measured ambient-pressure magnetic order switches from an antiferromagnetic to a ferromagnetic interplanar interaction and from 2D-like to 3D-like character. The overall antiferromagnetic structure within the ab planes, ferromagnetic chains antiferromagnetically coupled, is preserved, but the magnetic propagation vector is altered from k=(0,1,1/2) to k=(0,1,0), a halving of the magnetic unit cell size. At higher pressures, coincident with the second structural transition and the insulator-metal transition in this compound, we observe a suppression of this long-range order and emergence of a form of magnetic short-range order which survives above room temperature. Reverse Monte Carlo fitting suggests this phase to be a short-ranged version of the original ambient-pressure structure—with the Fe moment size remaining of similar magnitude and with a return to antiferromagnetic interplanar correlations. The persistence of magnetism well into the HP-II metallic state is an observation in contradiction with previous x-ray spectroscopy results which suggest a spin-crossover transition.Matthew J. CoakDavid M. JarvisHayrullo HamidovAndrew R. WildesJoseph A. M. PaddisonCheng LiuCharles R. S. HainesNgoc T. DangSergey E. KichanovBoris N. SavenkoSungmin LeeMarie KratochvílováStefan KlotzThomas C. HansenDenis P. KozlenkoJe-Geun ParkSiddharth S. SaxenaAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 1, p 011024 (2021)
institution DOAJ
collection DOAJ
language EN
topic Physics
QC1-999
spellingShingle Physics
QC1-999
Matthew J. Coak
David M. Jarvis
Hayrullo Hamidov
Andrew R. Wildes
Joseph A. M. Paddison
Cheng Liu
Charles R. S. Haines
Ngoc T. Dang
Sergey E. Kichanov
Boris N. Savenko
Sungmin Lee
Marie Kratochvílová
Stefan Klotz
Thomas C. Hansen
Denis P. Kozlenko
Je-Geun Park
Siddharth S. Saxena
Emergent Magnetic Phases in Pressure-Tuned van der Waals Antiferromagnet FePS_{3}
description Layered van der Waals 2D magnetic materials are of great interest in fundamental condensed-matter physics research, as well as for potential applications in spintronics and device physics. We present neutron powder diffraction data using new ultrahigh-pressure techniques to measure the magnetic structure of Mott-insulating 2D honeycomb antiferromagnet FePS_{3} at pressures up to 183 kbar and temperatures down to 80 K. These data are complemented by high-pressure magnetometry and reverse Monte Carlo modeling of the spin configurations. As pressure is applied, the previously measured ambient-pressure magnetic order switches from an antiferromagnetic to a ferromagnetic interplanar interaction and from 2D-like to 3D-like character. The overall antiferromagnetic structure within the ab planes, ferromagnetic chains antiferromagnetically coupled, is preserved, but the magnetic propagation vector is altered from k=(0,1,1/2) to k=(0,1,0), a halving of the magnetic unit cell size. At higher pressures, coincident with the second structural transition and the insulator-metal transition in this compound, we observe a suppression of this long-range order and emergence of a form of magnetic short-range order which survives above room temperature. Reverse Monte Carlo fitting suggests this phase to be a short-ranged version of the original ambient-pressure structure—with the Fe moment size remaining of similar magnitude and with a return to antiferromagnetic interplanar correlations. The persistence of magnetism well into the HP-II metallic state is an observation in contradiction with previous x-ray spectroscopy results which suggest a spin-crossover transition.
format article
author Matthew J. Coak
David M. Jarvis
Hayrullo Hamidov
Andrew R. Wildes
Joseph A. M. Paddison
Cheng Liu
Charles R. S. Haines
Ngoc T. Dang
Sergey E. Kichanov
Boris N. Savenko
Sungmin Lee
Marie Kratochvílová
Stefan Klotz
Thomas C. Hansen
Denis P. Kozlenko
Je-Geun Park
Siddharth S. Saxena
author_facet Matthew J. Coak
David M. Jarvis
Hayrullo Hamidov
Andrew R. Wildes
Joseph A. M. Paddison
Cheng Liu
Charles R. S. Haines
Ngoc T. Dang
Sergey E. Kichanov
Boris N. Savenko
Sungmin Lee
Marie Kratochvílová
Stefan Klotz
Thomas C. Hansen
Denis P. Kozlenko
Je-Geun Park
Siddharth S. Saxena
author_sort Matthew J. Coak
title Emergent Magnetic Phases in Pressure-Tuned van der Waals Antiferromagnet FePS_{3}
title_short Emergent Magnetic Phases in Pressure-Tuned van der Waals Antiferromagnet FePS_{3}
title_full Emergent Magnetic Phases in Pressure-Tuned van der Waals Antiferromagnet FePS_{3}
title_fullStr Emergent Magnetic Phases in Pressure-Tuned van der Waals Antiferromagnet FePS_{3}
title_full_unstemmed Emergent Magnetic Phases in Pressure-Tuned van der Waals Antiferromagnet FePS_{3}
title_sort emergent magnetic phases in pressure-tuned van der waals antiferromagnet feps_{3}
publisher American Physical Society
publishDate 2021
url https://doaj.org/article/fcec1e79eb7648c68793eb997239cbfd
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