Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet

X. M. Chen; B. Farmer; J. S. Woods; S. Dhuey; W. Hu; C. Mazzoli; S. B. Wilkins; R. V. Chopdekar; A. Scholl; I. K. Robinson; L. E. De Long; S. Roy; J. T. Hastings

doi:10.1103/PhysRevLett.123.197202

Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet

X. M. Chen, B. Farmer, J. S. Woods, S. Dhuey, W. Hu, C. Mazzoli, S. B. Wilkins, R. V. Chopdekar, A. Scholl, I. K. Robinson, L. E. De Long, S. Roy, J. T. Hastings

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Collective dynamics often play an important role in determining the stability of ground states for both naturally occurring materials and metamaterials. We studied the temperature dependent dynamics of antiferromagnetically ordered superdomains in a square artificial spin lattice using soft x-ray photon correlation spectroscopy. We observed an exponential slowing down of superdomain wall motion below the antiferromagnetic onset temperature, similar to the behavior of typical bulk antiferromagnets. Using a continuous time random walk model we show that these superdomain walls undergo low-temperature ballistic and high-temperature diffusive motions.

Original language	English
Article number	197202
Journal	Physical Review Letters
Volume	123
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.123.197202
State	Published - Nov 6 2019

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© 2019 American Physical Society.

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General Physics and Astronomy

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title = "Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet",

abstract = "Collective dynamics often play an important role in determining the stability of ground states for both naturally occurring materials and metamaterials. We studied the temperature dependent dynamics of antiferromagnetically ordered superdomains in a square artificial spin lattice using soft x-ray photon correlation spectroscopy. We observed an exponential slowing down of superdomain wall motion below the antiferromagnetic onset temperature, similar to the behavior of typical bulk antiferromagnets. Using a continuous time random walk model we show that these superdomain walls undergo low-temperature ballistic and high-temperature diffusive motions.",

author = "Chen, {X. M.} and B. Farmer and Woods, {J. S.} and S. Dhuey and W. Hu and C. Mazzoli and Wilkins, {S. B.} and Chopdekar, {R. V.} and A. Scholl and Robinson, {I. K.} and {De Long}, {L. E.} and S. Roy and Hastings, {J. T.}",

note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

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doi = "10.1103/PhysRevLett.123.197202",

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AU - Chen, X. M.

AU - Farmer, B.

AU - Woods, J. S.

AU - Dhuey, S.

AU - Hu, W.

AU - Mazzoli, C.

AU - Wilkins, S. B.

AU - Chopdekar, R. V.

AU - Scholl, A.

AU - Robinson, I. K.

AU - De Long, L. E.

AU - Roy, S.

AU - Hastings, J. T.

PY - 2019/11/6

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N2 - Collective dynamics often play an important role in determining the stability of ground states for both naturally occurring materials and metamaterials. We studied the temperature dependent dynamics of antiferromagnetically ordered superdomains in a square artificial spin lattice using soft x-ray photon correlation spectroscopy. We observed an exponential slowing down of superdomain wall motion below the antiferromagnetic onset temperature, similar to the behavior of typical bulk antiferromagnets. Using a continuous time random walk model we show that these superdomain walls undergo low-temperature ballistic and high-temperature diffusive motions.

AB - Collective dynamics often play an important role in determining the stability of ground states for both naturally occurring materials and metamaterials. We studied the temperature dependent dynamics of antiferromagnetically ordered superdomains in a square artificial spin lattice using soft x-ray photon correlation spectroscopy. We observed an exponential slowing down of superdomain wall motion below the antiferromagnetic onset temperature, similar to the behavior of typical bulk antiferromagnets. Using a continuous time random walk model we show that these superdomain walls undergo low-temperature ballistic and high-temperature diffusive motions.

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Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet

Abstract

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