%0 Journal Article %1 Wang2004Improvement %A Wang, H. Y. %A Mao, W. H. %A Ma, X. K. %A Zhang, H. Y. %A Chen, Y. B. %A He, Y. J. %A Jiang, E. Y. %D 2004 %I AIP %J Journal of Applied Physics %K fept, magnetic-film %N 5 %P 2564--2568 %R 10.1063/1.1643785 %T Improvement in hard magnetic properties of FePt films by N addition %U http://dx.doi.org/10.1063/1.1643785 %V 95 %X The structure and magnetic properties of (Fe56Pt44)100−xNx alloy films with x=0–15 at. \% prepared by rf magnetron sputtering were investigated. Compared to an Fe56Pt44 binary film, (Fe56Pt44)100−xNx alloy films showed great enhancement in hard magnetic properties. A coercivity Hc of 1027 kA/m, a remanence Mr of 1.24 T, and a maximum energy product (BH)max of 260 kJ/m3 were obtained for an (Fe56Pt44)93N7 film annealed at 600 °C for 10 min, whereas the Fe56Pt44 film annealed at the same conditions gave Hc=682 kA/m, Mr=0.87 T, and (BH)max=132 kJ/m3. Structural analysis revealed that N addition influenced the phase structure and microstructure of FePt films. N atoms incorporated in the disordered FePt phase in as-deposited films, they released rapidly out of the FePt phase by vacuum annealing. It is suggested that the rapid release of N atoms from the FePt phase promotes the transformation to the ordered phase, results in a higher coercivity of the film. The high remanence of the (Fe56Pt44)93N7 film is attributed to enhanced exchange coupling of the soft iron nitride phase and the hard FePt phase. \copyright 2004 American Institute of Physics.

@article{Wang2004Improvement, abstract = {{The structure and magnetic properties of (Fe56Pt44)100−xNx alloy films with x=0–15 at. \% prepared by rf magnetron sputtering were investigated. Compared to an Fe56Pt44 binary film, (Fe56Pt44)100−xNx alloy films showed great enhancement in hard magnetic properties. A coercivity Hc of 1027 kA/m, a remanence Mr of 1.24 T, and a maximum energy product (BH)max of 260 kJ/m3 were obtained for an (Fe56Pt44)93N7 film annealed at 600 °C for 10 min, whereas the Fe56Pt44 film annealed at the same conditions gave Hc=682 kA/m, Mr=0.87 T, and (BH)max=132 kJ/m3. Structural analysis revealed that N addition influenced the phase structure and microstructure of FePt films. N atoms incorporated in the disordered FePt phase in as-deposited films, they released rapidly out of the FePt phase by vacuum annealing. It is suggested that the rapid release of N atoms from the FePt phase promotes the transformation to the ordered phase, results in a higher coercivity of the film. The high remanence of the (Fe56Pt44)93N7 film is attributed to enhanced exchange coupling of the soft iron nitride phase and the hard FePt phase. {\copyright} 2004 American Institute of Physics.}}, added-at = {2019-02-26T15:22:34.000+0100}, author = {Wang, H. Y. and Mao, W. H. and Ma, X. K. and Zhang, H. Y. and Chen, Y. B. and He, Y. J. and Jiang, E. Y.}, biburl = {https://www.bibsonomy.org/bibtex/20ecffdefac2e404ebcf77cf3084df7ae/rspreeuw}, citeulike-article-id = {9834851}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=JAPIAU000095000005002564000001\&idtype=cvips\&gifs=yes}, citeulike-linkout-1 = {http://link.aip.org/link/?JAP/95/2564}, citeulike-linkout-2 = {http://dx.doi.org/10.1063/1.1643785}, doi = {10.1063/1.1643785}, interhash = {f49d468b3ffff77c5618fd3bcc10d97f}, intrahash = {0ecffdefac2e404ebcf77cf3084df7ae}, journal = {Journal of Applied Physics}, keywords = {fept, magnetic-film}, number = 5, pages = {2564--2568}, posted-at = {2011-09-30 12:43:47}, priority = {2}, publisher = {AIP}, timestamp = {2019-02-26T15:22:34.000+0100}, title = {{Improvement in hard magnetic properties of FePt films by N addition}}, url = {http://dx.doi.org/10.1063/1.1643785}, volume = 95, year = 2004 }