Chen, XM;
Farmer, B;
Woods, JS;
Dhuey, S;
Hu, W;
Mazzoli, C;
Wilkins, SB;
... Hastings, JT; + view all
(2019)
Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet.
Physical Review Letters
, 123
(19)
, Article 197202. 10.1103/physrevlett.123.197202.
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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.
| Type: | Article |
|---|---|
| Title: | Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevlett.123.197202 |
| Publisher version: | https://doi.org/10.1103/physrevlett.123.197202 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10086426 |
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