TY - GEN
T1 - Mechanism of higher order contributions in interface anisotropy of thin films
T2 - 2015 IEEE International Magnetics Conference, INTERMAG 2015
AU - Barker, J.
AU - Kalitsov, A.
AU - Singh, A.
AU - Mryasov, O. N.
AU - Okatov, S.
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/7/14
Y1 - 2015/7/14
N2 - Current state of the art perpendicular magnetic tunnel junctions (pMTJs) rely upon a large uniaxial interface anisotropy to overcome the demagnetizing field [1-3]. Experimental measurements have found that as well as the expected K1sin2(θ) anisotropy energy, a higher order K2sin4(θ) contribution is present [2,3]. In thin films with bulk anisotropies K2 can arise from a distribution of the anisotropy axes. In the course of constructing a model of FeCo/MgO we unexpectedly found a K2 sin4(θ) dependence in the free energy, even without any disorder in the anisotropy axes or higher order magneto-crystalline anisotropy.
AB - Current state of the art perpendicular magnetic tunnel junctions (pMTJs) rely upon a large uniaxial interface anisotropy to overcome the demagnetizing field [1-3]. Experimental measurements have found that as well as the expected K1sin2(θ) anisotropy energy, a higher order K2sin4(θ) contribution is present [2,3]. In thin films with bulk anisotropies K2 can arise from a distribution of the anisotropy axes. In the course of constructing a model of FeCo/MgO we unexpectedly found a K2 sin4(θ) dependence in the free energy, even without any disorder in the anisotropy axes or higher order magneto-crystalline anisotropy.
UR - http://www.scopus.com/inward/record.url?scp=84942474736&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84942474736&partnerID=8YFLogxK
U2 - 10.1109/INTMAG.2015.7157633
DO - 10.1109/INTMAG.2015.7157633
M3 - Conference contribution
AN - SCOPUS:84942474736
T3 - 2015 IEEE International Magnetics Conference, INTERMAG 2015
BT - 2015 IEEE International Magnetics Conference, INTERMAG 2015
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 11 May 2015 through 15 May 2015
ER -