dc.contributor.author | Saharan, L | |
dc.contributor.author | Morrison, C | |
dc.contributor.author | Ikeda, Y | |
dc.contributor.author | Takano, K | |
dc.contributor.author | Miles, JJ | |
dc.contributor.author | Thomson, T | |
dc.contributor.author | Schrefl, T | |
dc.contributor.author | Hrkac, G | |
dc.date.accessioned | 2016-04-27T13:18:40Z | |
dc.date.issued | 2013-04-08 | |
dc.description.abstract | We show that thermal-stability and the associated switching field in well segregated, nanoscale granular materials is explained by grain boundary and interface effects. Grain boundaries pose a fundamental limit on scaling rooted in their chemical and morphological structure, while exchange interactions across interfaces cause the switching to deviate from the expected coherent Stoner-Wohlfarth behaviour. Measurements and simulations of CoCrPt-systems show a clear shift in applied field angle behaviour, arising from exchange-coupling between magnetic-phases, while the quantitative switching field can only be explained by a transition layer surrounding the grains. These results are potentially significant for Heat-Assisted-Magnetic Recording and Bit-Patterned-Media Recording. © 2013 AIP Publishing LLC. | en_GB |
dc.description.sponsorship | We would like to thank the EPSRC for financial support under Grants No. EP/G032440/1, EP/G032300/1, the WWTF Project MA09-029 and the Royal Society. | en_GB |
dc.identifier.citation | Vol. 102 (14), article 142402 | en_GB |
dc.identifier.doi | 10.1063/1.4801316 | |
dc.identifier.uri | http://hdl.handle.net/10871/21283 | |
dc.language.iso | en | en_GB |
dc.publisher | American Institute of Physics (AIP) | en_GB |
dc.subject | Grain boundaries | en_GB |
dc.subject | Interface structure | en_GB |
dc.subject | Crystal structure | en_GB |
dc.subject | Materials properties | en_GB |
dc.subject | Composite materials | en_GB |
dc.title | Grain boundaries in granular materials-A fundamental limit for thermal stability | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2016-04-27T13:18:40Z | |
dc.identifier.issn | 0003-6951 | |
dc.description | This is the final version of the article. Available from the American Institute of Physics via the DOI in this record. | en_GB |
dc.identifier.journal | Applied Physics Letters | en_GB |