Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice

• Main Authors: Krishnia, Sachin, Purnama, Indra, Lew, Wen Siang
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2017
• Subjects: Domain Walls; Spin Ice
• Online Access: https://hdl.handle.net/10356/85725; http://hdl.handle.net/10220/43811
• Institution: Nanyang Technological University

In a patterned Co honeycomb spin ice structure, we show that violation in the ice-rule or magnetic monopoles, can be observed during a magnetization reversal process in 430 Oe≤H≤760 Oe magnetic field (H) range. The monopoles are shown to originate from the nucleation of domain walls at the edges, an...