Towards artificial Ising spin glasses: Thermal ordering in randomized arrays of Ising-type nanomagnets
Abstract
We explore the thermodynamics in two-dimensional arrays consisting of Ising-type nanomagnets lithographically arranged onto random sites and angular orientations. Introducing these basic spin-glass ingredients, we study the characteristic features of the low-energy states achieved, following thermal-annealing protocols. From direct visualization of real-time dynamics, we record relaxation timescales together with magnetic susceptibility variations over temperature, revealing trends towards short-range order as randomness is increased, but falling short of pure spin-glass behavior. Our work provides a route towards the realization of artificial Ising spin-glass systems.
- Authors:
-
- Univ. of California, Santa Cruz, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of Hamburg (Germany)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- ETH Zurich (Switzerland). Lab. for Mesoscopic Systems, Dept. of Materials; Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- Univ. of Hamburg (Germany)
- Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering
- Harbin Inst. of Technology (China)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS) ; Aalto Univ., Otaniemi (Finland). School of Science; Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1594920
- Alternate Identifier(s):
- OSTI ID: 1524114
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 22; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Antiferromagnetism; Ferromagnetism; Frustrated magnetism; Spin texture; Magnetic nanoparticles; Nanostructures; Spin glasses; Spin ice; Photoelectron emission microscopy; X-ray magnetic circular dichroism
Citation Formats
Saccone, Michael, Scholl, Andreas, Velten, Sven, Dhuey, Scott, Hofhuis, Kevin, Wuth, Clemens, Huang, Yen-Lin, Chen, Zuhuang, Chopdekar, Rajesh V., and Farhan, Alan. Towards artificial Ising spin glasses: Thermal ordering in randomized arrays of Ising-type nanomagnets. United States: N. p., 2019.
Web. doi:10.1103/physrevb.99.224403.
Saccone, Michael, Scholl, Andreas, Velten, Sven, Dhuey, Scott, Hofhuis, Kevin, Wuth, Clemens, Huang, Yen-Lin, Chen, Zuhuang, Chopdekar, Rajesh V., & Farhan, Alan. Towards artificial Ising spin glasses: Thermal ordering in randomized arrays of Ising-type nanomagnets. United States. https://doi.org/10.1103/physrevb.99.224403
Saccone, Michael, Scholl, Andreas, Velten, Sven, Dhuey, Scott, Hofhuis, Kevin, Wuth, Clemens, Huang, Yen-Lin, Chen, Zuhuang, Chopdekar, Rajesh V., and Farhan, Alan. Mon .
"Towards artificial Ising spin glasses: Thermal ordering in randomized arrays of Ising-type nanomagnets". United States. https://doi.org/10.1103/physrevb.99.224403. https://www.osti.gov/servlets/purl/1594920.
@article{osti_1594920,
title = {Towards artificial Ising spin glasses: Thermal ordering in randomized arrays of Ising-type nanomagnets},
author = {Saccone, Michael and Scholl, Andreas and Velten, Sven and Dhuey, Scott and Hofhuis, Kevin and Wuth, Clemens and Huang, Yen-Lin and Chen, Zuhuang and Chopdekar, Rajesh V. and Farhan, Alan},
abstractNote = {We explore the thermodynamics in two-dimensional arrays consisting of Ising-type nanomagnets lithographically arranged onto random sites and angular orientations. Introducing these basic spin-glass ingredients, we study the characteristic features of the low-energy states achieved, following thermal-annealing protocols. From direct visualization of real-time dynamics, we record relaxation timescales together with magnetic susceptibility variations over temperature, revealing trends towards short-range order as randomness is increased, but falling short of pure spin-glass behavior. Our work provides a route towards the realization of artificial Ising spin-glass systems.},
doi = {10.1103/physrevb.99.224403},
journal = {Physical Review B},
number = 22,
volume = 99,
place = {United States},
year = {2019},
month = {6}
}
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