Observation of half-height magnetization steps in Sr{sub 2}RuO{sub 4 }.
- Materials Science Division
Spin-triplet superfluids can support exotic objects, such as half-quantum vortices characterized by the nontrivial winding of the spin structure. We present cantilever magnetometry measurements performed on mesoscopic samples of Sr{sub 2}RuO{sub 4}, a spin-triplet superconductor. With micrometer-sized annular-shaped samples, we observed transitions between integer fluxoid states as well as a regime characterized by 'half-integer transitions' - steps in the magnetization with half the height of the ones we observed between integer fluxoid states. These half-height steps are consistent with the existence of half-quantum vortices in superconducting Sr{sub 2}RuO{sub 4}.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1010910
- Report Number(s):
- ANL/MSD/JA-69651
- Journal Information:
- Science, Journal Name: Science Journal Issue: Jan. 14, 2011 Vol. 331; ISSN SCIEAS; ISSN 0036-8075
- Country of Publication:
- United States
- Language:
- ENGLISH
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