Skyrmion fluctuations at a first-order phase transition boundary

Esposito, V.; Zheng, X. Y.; Seaberg, M. H.; Montoya, S. A.; Holladay, B.; Reid, A. H.; Streubel, R.; Lee, J. C.  T.; Shen, L.; Koralek, J. D.; Coslovich, G.; Walter, P.; Zohar, S.; Thampy, V.; Lin, M. F.; Hart, P.; Nakahara, K.; Fischer, P.; Colocho, W.; Lutman, A.; Decker, F. -J.; Sinha, S. K.; Fullerton, E. E.; Kevan, S. D.; Roy, S.; Dunne, M.; Turner, J. J.

doi:10.1063/5.0004879

Title: Skyrmion fluctuations at a first-order phase transition boundary

Journal Article · Mon May 04 00:00:00 EDT 2020 · Applied Physics Letters

DOI:https://doi.org/10.1063/5.0004879· OSTI ID:1632651

^[1];

^[2]; Montoya, S. A. ^[3]; Holladay, B. ^[4];

^[2];

^[5]; Lee, J. C. T. ^[6]; Shen, L. ^[1]; Koralek, J. D. ^[2];

^[2]; Walter, P. ^[2];

^[2]; Thampy, V. ^[7]; Lin, M. F. ^[2];

^[2]; Nakahara, K. ^[2]; Fischer, P. ^[8]; Colocho, W. ^[2]; Lutman, A. ^[2] more »

SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
Naval Information Warfare Center Pacific, San Diego, CA (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS); Univ. of California, San Diego, CA (United States). Dept. of Physics
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
Univ. of Oregon, Eugene, OR (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Santa Cruz, CA (United States)
Univ. of California, San Diego, CA (United States). Dept. of Physics
Univ. of California, San Diego, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Magnetic skyrmions are topologically protected spin textures with promising prospects for applications in data storage. They can form a lattice state due to competing magnetic interactions and are commonly found in a small region of the temperature—magnetic field phase diagram. Recent work has demonstrated that these magnetic quasi-particles fluctuate at the μeV energy scale. Here, we use a coherent x-ray correlation method at an x-ray free-electron laser to investigate these fluctuations in a magnetic phase coexistence region near a first-order transition boundary where fluctuations are not expected to play a major role. Surprisingly, we find that the relaxation of the intermediate scattering function at this transition differs significantly compared to that deep in the skyrmion lattice phase. The observation of a compressed exponential behavior suggests solid-like dynamics, often associated with jamming. We assign this behavior to disorder and the phase coexistence observed in a narrow field-window near the transition, which can cause fluctuations that lead to glassy behavior.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-76SF00515; AC02-05-CH11231; SC0003678

OSTI ID:: 1632651

Alternate ID(s):: OSTI ID: 1617087; OSTI ID: 1775384

Journal Information:: Applied Physics Letters, Vol. 116, Issue 18; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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Title: Skyrmion fluctuations at a first-order phase transition boundary

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