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Disorder-induced time effect in the antiferromagnetic domain state of Fe1+yTe

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Disorder-induced time effect in the antiferromagnetic domain state of Fe1+yTe. / Fikáček, Jan; Warmuth, Jonas; Arnold, Fabian et al.

I: Journal of Magnetism and Magnetic Materials, Bind 540, 168426, 12.2021.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Fikáček, J, Warmuth, J, Arnold, F, Piamonteze, C, Mao, Z, Holý, V, Hofmann, P, Bremholm, M, Wiebe, J, Wiesendanger, R & Honolka, J 2021, 'Disorder-induced time effect in the antiferromagnetic domain state of Fe1+yTe', Journal of Magnetism and Magnetic Materials, bind 540, 168426. https://doi.org/10.1016/j.jmmm.2021.168426

APA

Fikáček, J., Warmuth, J., Arnold, F., Piamonteze, C., Mao, Z., Holý, V., Hofmann, P., Bremholm, M., Wiebe, J., Wiesendanger, R., & Honolka, J. (2021). Disorder-induced time effect in the antiferromagnetic domain state of Fe1+yTe. Journal of Magnetism and Magnetic Materials, 540, [168426]. https://doi.org/10.1016/j.jmmm.2021.168426

CBE

Fikáček J, Warmuth J, Arnold F, Piamonteze C, Mao Z, Holý V, Hofmann P, Bremholm M, Wiebe J, Wiesendanger R, et al. 2021. Disorder-induced time effect in the antiferromagnetic domain state of Fe1+yTe. Journal of Magnetism and Magnetic Materials. 540:Article 168426. https://doi.org/10.1016/j.jmmm.2021.168426

MLA

Vancouver

Fikáček J, Warmuth J, Arnold F, Piamonteze C, Mao Z, Holý V et al. Disorder-induced time effect in the antiferromagnetic domain state of Fe1+yTe. Journal of Magnetism and Magnetic Materials. 2021 dec.;540:168426. doi: 10.1016/j.jmmm.2021.168426

Author

Fikáček, Jan ; Warmuth, Jonas ; Arnold, Fabian et al. / Disorder-induced time effect in the antiferromagnetic domain state of Fe1+yTe. I: Journal of Magnetism and Magnetic Materials. 2021 ; Bind 540.

Bibtex

@article{c612d7b4ad8340ef92a2d9eb1935c1ae,
title = "Disorder-induced time effect in the antiferromagnetic domain state of Fe1+yTe",
abstract = "We report on temperature-dependent soft X-ray absorption spectroscopy (XAS) measurements utilizing linearly polarized synchrotron radiation to probe magnetic phase transitions in iron-rich Fe1+yTe (y ≈ 0.12). X-ray magnetic linear dichroism (XMLD) signals, which sense magnetic ordering processes at surfaces, start to increase monotonically below the N{\'e}el temperature TN = 57 K. This increase is due to a progressive bicollinear antiferromagnetic (AFM) alignment of Fe spins of the monoclinic Fe1+yTe parent phase. This AFM alignment was achieved by a [1 0 0]-oriented biasing field favoring a single-domain state during cooling across TN. Our specific heat and magnetization measurements confirm the bulk character of this AFM phase transition. On longer time scales, however, we observe that the field-biased AFM state is highly unstable even at the lowest temperature of T = 3 K. After switching off the biasing field, the XMLD signal decays exponentially with a time constant τ = 1506 s. The initial XMLD signal is restored only upon repeating a cycle consisting of heating and field-cooling through TN. We explain the time effect by a gradual formation of a multi-domain state with 90° rotated AFM domains, promoted by structural disorder, facilitating the motion of twin-domains. Significant disorder in our Fe1+yTe sample is evident from our X-ray diffraction and specific heat data. The stability of magnetic phases in Fe-chalcogenides is an important material property, since the Fe(Te1-xSex) phase diagram shows magnetism intimately connected with superconductivity.",
keywords = "Antiferromagnetism, Domain structure, Iron chalcogenides, X-ray magnetic linear dichroism",
author = "Jan Fik{\'a}{\v c}ek and Jonas Warmuth and Fabian Arnold and Cinthia Piamonteze and Zhiqiang Mao and V{\'a}clav Hol{\'y} and Philip Hofmann and Martin Bremholm and Jens Wiebe and Roland Wiesendanger and Jan Honolka",
note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",
year = "2021",
month = dec,
doi = "10.1016/j.jmmm.2021.168426",
language = "English",
volume = "540",
journal = "Journal of Magnetism and Magnetic Materials",
issn = "0304-8853",
publisher = "Elsevier BV * North-Holland",

}

RIS

TY - JOUR

T1 - Disorder-induced time effect in the antiferromagnetic domain state of Fe1+yTe

AU - Fikáček, Jan

AU - Warmuth, Jonas

AU - Arnold, Fabian

AU - Piamonteze, Cinthia

AU - Mao, Zhiqiang

AU - Holý, Václav

AU - Hofmann, Philip

AU - Bremholm, Martin

AU - Wiebe, Jens

AU - Wiesendanger, Roland

AU - Honolka, Jan

N1 - Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/12

Y1 - 2021/12

N2 - We report on temperature-dependent soft X-ray absorption spectroscopy (XAS) measurements utilizing linearly polarized synchrotron radiation to probe magnetic phase transitions in iron-rich Fe1+yTe (y ≈ 0.12). X-ray magnetic linear dichroism (XMLD) signals, which sense magnetic ordering processes at surfaces, start to increase monotonically below the Néel temperature TN = 57 K. This increase is due to a progressive bicollinear antiferromagnetic (AFM) alignment of Fe spins of the monoclinic Fe1+yTe parent phase. This AFM alignment was achieved by a [1 0 0]-oriented biasing field favoring a single-domain state during cooling across TN. Our specific heat and magnetization measurements confirm the bulk character of this AFM phase transition. On longer time scales, however, we observe that the field-biased AFM state is highly unstable even at the lowest temperature of T = 3 K. After switching off the biasing field, the XMLD signal decays exponentially with a time constant τ = 1506 s. The initial XMLD signal is restored only upon repeating a cycle consisting of heating and field-cooling through TN. We explain the time effect by a gradual formation of a multi-domain state with 90° rotated AFM domains, promoted by structural disorder, facilitating the motion of twin-domains. Significant disorder in our Fe1+yTe sample is evident from our X-ray diffraction and specific heat data. The stability of magnetic phases in Fe-chalcogenides is an important material property, since the Fe(Te1-xSex) phase diagram shows magnetism intimately connected with superconductivity.

AB - We report on temperature-dependent soft X-ray absorption spectroscopy (XAS) measurements utilizing linearly polarized synchrotron radiation to probe magnetic phase transitions in iron-rich Fe1+yTe (y ≈ 0.12). X-ray magnetic linear dichroism (XMLD) signals, which sense magnetic ordering processes at surfaces, start to increase monotonically below the Néel temperature TN = 57 K. This increase is due to a progressive bicollinear antiferromagnetic (AFM) alignment of Fe spins of the monoclinic Fe1+yTe parent phase. This AFM alignment was achieved by a [1 0 0]-oriented biasing field favoring a single-domain state during cooling across TN. Our specific heat and magnetization measurements confirm the bulk character of this AFM phase transition. On longer time scales, however, we observe that the field-biased AFM state is highly unstable even at the lowest temperature of T = 3 K. After switching off the biasing field, the XMLD signal decays exponentially with a time constant τ = 1506 s. The initial XMLD signal is restored only upon repeating a cycle consisting of heating and field-cooling through TN. We explain the time effect by a gradual formation of a multi-domain state with 90° rotated AFM domains, promoted by structural disorder, facilitating the motion of twin-domains. Significant disorder in our Fe1+yTe sample is evident from our X-ray diffraction and specific heat data. The stability of magnetic phases in Fe-chalcogenides is an important material property, since the Fe(Te1-xSex) phase diagram shows magnetism intimately connected with superconductivity.

KW - Antiferromagnetism

KW - Domain structure

KW - Iron chalcogenides

KW - X-ray magnetic linear dichroism

UR - http://www.scopus.com/inward/record.url?scp=85113583726&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2021.168426

DO - 10.1016/j.jmmm.2021.168426

M3 - Journal article

AN - SCOPUS:85113583726

VL - 540

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

M1 - 168426

ER -