Irradiation of IrMn-based spin valves with 550 eV hydrogen ions increased their giant magnetoresistance and exchange bias by 20% and 60%, respectively. This significant enhancement stems from the strong (111) texture and small mosaic spread of the IrMn antiferromagnet that resulted from the microstructural reconstruction caused by the energy transfer during the bombardment by hydrogen ions, as well as by the narrow dispersion in the exchange bias. Irradiation with the hydrogen ion at low energy can improve the properties of spin valves without resulting in undue degradation in the performance or the microstructure.
Bibliographical noteFunding Information:
This work was supported in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD, Basic Research Promotion Fund) (Grant No. KRF-2006-331-D00230) and by a grant (Grant No. M102KN010005-07K1401-00530) from the Center for Nanoscale Mechatronics & Manufacturing, one of the 21st Century Frontier Research Programs supported by the Ministry of Science and Technology, Korea. The authors gratefully acknowledge Dr. Y. J. Park, Dr. H. H. Lee, and Dr. D. R. Lee for their help in carrying out the XRD at PAL.
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy