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Title: Textured heterogeneity in square artificial spin ice

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4];  [3];  [1];  [3];  [5];  [6];  [1];  [4]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Oregon, Eugene, OR (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Indian Inst. of Technology (BHU), Varanasi (India)
  3. Univ. of Kentucky, Lexington, KY (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Santa Cruz, CA (United States)
+ Show Author Affiliations

Here, we report evidence of spontaneous formation of a heterogeneous network of superdomains in two-dimensional square artificial spin ice nanostructures in externally applied magnetic fields. Coherent resonant soft-x-ray scattering from such textures gives rise to unique internal structure in Bragg peaks. The magnetic heterogeneity is locally disordered but has a zigzag texture at longer length scales. Our result suggests that the macroscopic magnetic texture is derived from the microscopic structure of the Dirac strings.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences & Engineering Division (SC-22.2)
Grant/Contract Number:
AC02-05CH11231; FG02-97ER45653
OSTI ID:
1498689
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 2 Vol. 99; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (20)

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Artificial ‘spin ice’ in a geometrically frustrated lattice of nanoscale ferromagnetic islands journal January 2006
Magnetic monopoles in spin ice journal January 2008
Topological frustration of artificial spin ice journal January 2017
Thermal fluctuations in artificial spin ice journal June 2014
Signature of magnetic monopole and Dirac string dynamics in spin ice journal March 2009
Real-space observation of emergent magnetic monopoles and associated Dirac strings in artificial kagome spin ice journal October 2010
Thermal ground-state ordering and elementary excitations in artificial magnetic square ice journal November 2010
Pinch points and Kasteleyn transitions in kagome ice journal June 2007
Magnetic monopole and string excitations in two-dimensional spin ice journal September 2009
Thermalized ground state of artificial kagome spin ice building blocks journal September 2012
Magnetic interactions and reversal of artificial square spin ices journal July 2012
Resonant magneto-optical properties of Fe near its 2 p levels: Measurement and applications journal November 2000
Extended reciprocal space observation of artificial spin ice with x-ray resonant magnetic scattering journal December 2013
Direct visualization of memory effects in artificial spin ice journal September 2015
Hysteresis and return-point memory in colloidal artificial spin ice systems journal August 2012
Direct Observation of Thermal Relaxation in Artificial Spin Ice journal August 2013
Colloquium : Artificial spin ice: Designing and imaging magnetic frustration journal October 2013
Tunable Coherent Soft X-Rays journal November 2004
Magnetic Coulomb Phase in the Spin Ice Ho2Ti2O7 journal September 2009

Cited By (1)

Advances in artificial spin ice journal November 2019

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