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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 AF 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.

Authors:
 [1]; ORCiD logo [2];  [3];  [3];  [4];  [5];  [5];  [5];  [3];  [4];  [3]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Kentucky, Lexington, KY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); London Centre for Nanotechnology, London (United Kingdom)
  3. Univ. of Kentucky, Lexington, KY (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1566874
Report Number(s):
BNL-212118-2019-JAAM
Journal ID: ISSN 0031--9007
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 19; Journal ID: ISSN 0031--9007
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Chen, X. M., Robinson, Ian K., Farmer, B., Woods, J. S., Dhuey, S., Hu, W., Mazzoli, C., Wilkins, S. B., De Long, L. E., Roy, S., and Hastings, J. T. Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.123.197202.
Chen, X. M., Robinson, Ian K., Farmer, B., Woods, J. S., Dhuey, S., Hu, W., Mazzoli, C., Wilkins, S. B., De Long, L. E., Roy, S., & Hastings, J. T. Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet. United States. doi:10.1103/PhysRevLett.123.197202.
Chen, X. M., Robinson, Ian K., Farmer, B., Woods, J. S., Dhuey, S., Hu, W., Mazzoli, C., Wilkins, S. B., De Long, L. E., Roy, S., and Hastings, J. T. Tue . "Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet". United States. doi:10.1103/PhysRevLett.123.197202.
@article{osti_1566874,
title = {Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet},
author = {Chen, X. M. and Robinson, Ian K. and Farmer, B. and Woods, J. S. and Dhuey, S. and Hu, W. and Mazzoli, C. and Wilkins, S. B. and De Long, L. E. and Roy, S. and Hastings, J. T.},
abstractNote = {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 AF 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.},
doi = {10.1103/PhysRevLett.123.197202},
journal = {Physical Review Letters},
number = 19,
volume = 123,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
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This content will become publicly available on October 15, 2020
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