| dc.creator |
Saharan, L |
|
| dc.creator |
Morrison, C |
|
| dc.creator |
Ikeda, Y |
|
| dc.creator |
Takano, K |
|
| dc.creator |
Miles, JJ |
|
| dc.creator |
Thomson, T |
|
| dc.creator |
Schrefl, T |
|
| dc.creator |
Hrkac, G |
|
| dc.date |
2016-04-27T13:18:40Z |
|
| dc.date |
2013 |
|
| dc.date |
2016-04-27T13:18:40Z |
|
| dc.identifier |
Vol. 102 (14), article 142402 |
|
| dc.identifier |
10.1063/1.4801316 |
|
| dc.identifier |
http://hdl.handle.net/10871/21283 |
|
| dc.identifier |
0003-6951 |
|
| dc.identifier |
Applied Physics Letters |
|
| dc.description |
This is the final version of the article. Available from the American Institute of Physics via the DOI in this record. |
|
| dc.description |
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. |
|
| dc.description |
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. |
|
| dc.language |
en |
|
| dc.publisher |
American Institute of Physics (AIP) |
|
| dc.subject |
Grain boundaries |
|
| dc.subject |
Interface structure |
|
| dc.subject |
Crystal structure |
|
| dc.subject |
Materials properties |
|
| dc.subject |
Composite materials |
|
| dc.title |
Grain boundaries in granular materials-A fundamental limit for thermal stability |
|
| dc.type |
Article |
|