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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2021-02-01
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Series: | Physical Review X |
Online Access: | http://doi.org/10.1103/PhysRevX.11.011024 |
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doaj-fcec1e79eb7648c68793eb997239cbfd2021-02-05T15:10:11ZengAmerican Physical SocietyPhysical Review X2160-33082021-02-0111101102410.1103/PhysRevX.11.011024Emergent Magnetic Phases in Pressure-Tuned van der Waals Antiferromagnet FePS_{3}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. SaxenaLayered 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.http://doi.org/10.1103/PhysRevX.11.011024 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
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 |
spellingShingle |
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} Physical Review X |
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 |
series |
Physical Review X |
issn |
2160-3308 |
publishDate |
2021-02-01 |
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. |
url |
http://doi.org/10.1103/PhysRevX.11.011024 |
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