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Observation of Exchange Bias in Antiferromagnetic Cr(0.79)Se Due to the Coexistence of Itinerant Weak Ferromagnetism at Low Temperatures

[Image: see text] We report on the structural, electrical transport, and magnetic properties of antiferromagnetic transition-metal monochalcogenide Cr(0.79)Se. Different from the existing off-stoichiometric compositions, Cr(0.79)Se is found to be synthesized into the same NiAs-type hexagonal crystal...

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Autores principales: Routh, Sayan, Thirupathaiah, Setti
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8552323/
https://www.ncbi.nlm.nih.gov/pubmed/34723001
http://dx.doi.org/10.1021/acsomega.1c03986
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author Routh, Sayan
Thirupathaiah, Setti
author_facet Routh, Sayan
Thirupathaiah, Setti
author_sort Routh, Sayan
collection PubMed
description [Image: see text] We report on the structural, electrical transport, and magnetic properties of antiferromagnetic transition-metal monochalcogenide Cr(0.79)Se. Different from the existing off-stoichiometric compositions, Cr(0.79)Se is found to be synthesized into the same NiAs-type hexagonal crystal structure as that of CrSe. Resistivity data suggest Cr(0.79)Se to be a Fermi-liquid-type metal at low temperatures, while at intermediate temperatures, the resistivity depends sublinearly on the temperature. Eventually, at elevated temperatures, the rate of change of resistivity rapidly decreases with increasing temperature. Magnetic measurements suggest a transition from the paramagnetic phase to an antiferromagnetic phase at a Néel temperature of 225 K. Further reduction of the sample temperature results in the coexistence of weak ferromagnetism along with the antiferromagnetic phase below 100 K. As a result, below 100 K, we identify a significant exchange bias due to the interaction between the ferro- and antiferromagnetic phases. In addition, from temperature-dependent X-ray diffraction measurements, we observe that the NiAs-type structure is stable up to as high as 600 °C.
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spelling pubmed-85523232021-10-29 Observation of Exchange Bias in Antiferromagnetic Cr(0.79)Se Due to the Coexistence of Itinerant Weak Ferromagnetism at Low Temperatures Routh, Sayan Thirupathaiah, Setti ACS Omega [Image: see text] We report on the structural, electrical transport, and magnetic properties of antiferromagnetic transition-metal monochalcogenide Cr(0.79)Se. Different from the existing off-stoichiometric compositions, Cr(0.79)Se is found to be synthesized into the same NiAs-type hexagonal crystal structure as that of CrSe. Resistivity data suggest Cr(0.79)Se to be a Fermi-liquid-type metal at low temperatures, while at intermediate temperatures, the resistivity depends sublinearly on the temperature. Eventually, at elevated temperatures, the rate of change of resistivity rapidly decreases with increasing temperature. Magnetic measurements suggest a transition from the paramagnetic phase to an antiferromagnetic phase at a Néel temperature of 225 K. Further reduction of the sample temperature results in the coexistence of weak ferromagnetism along with the antiferromagnetic phase below 100 K. As a result, below 100 K, we identify a significant exchange bias due to the interaction between the ferro- and antiferromagnetic phases. In addition, from temperature-dependent X-ray diffraction measurements, we observe that the NiAs-type structure is stable up to as high as 600 °C. American Chemical Society 2021-10-11 /pmc/articles/PMC8552323/ /pubmed/34723001 http://dx.doi.org/10.1021/acsomega.1c03986 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Routh, Sayan
Thirupathaiah, Setti
Observation of Exchange Bias in Antiferromagnetic Cr(0.79)Se Due to the Coexistence of Itinerant Weak Ferromagnetism at Low Temperatures
title Observation of Exchange Bias in Antiferromagnetic Cr(0.79)Se Due to the Coexistence of Itinerant Weak Ferromagnetism at Low Temperatures
title_full Observation of Exchange Bias in Antiferromagnetic Cr(0.79)Se Due to the Coexistence of Itinerant Weak Ferromagnetism at Low Temperatures
title_fullStr Observation of Exchange Bias in Antiferromagnetic Cr(0.79)Se Due to the Coexistence of Itinerant Weak Ferromagnetism at Low Temperatures
title_full_unstemmed Observation of Exchange Bias in Antiferromagnetic Cr(0.79)Se Due to the Coexistence of Itinerant Weak Ferromagnetism at Low Temperatures
title_short Observation of Exchange Bias in Antiferromagnetic Cr(0.79)Se Due to the Coexistence of Itinerant Weak Ferromagnetism at Low Temperatures
title_sort observation of exchange bias in antiferromagnetic cr(0.79)se due to the coexistence of itinerant weak ferromagnetism at low temperatures
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8552323/
https://www.ncbi.nlm.nih.gov/pubmed/34723001
http://dx.doi.org/10.1021/acsomega.1c03986
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