Open AccessThe complementary nature of coercivity enhancement and exchange bias in a general ferro-antiferromagnet exchange coupled system
Author(s) -
Congxiao Liu,
Hideo Fujiwara,
Min Sun
Publication year - 2007
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.2714669
Subject(s) - condensed matter physics , coercivity , magnetization , antiferromagnetism , single domain , exchange bias , anisotropy , field (mathematics) , magnetic anisotropy , saturation (graph theory) , magnetization reversal , coupling (piping) , physics , magnetic field , materials science , mathematics , quantum mechanics , pure mathematics , metallurgy , combinatorics
Complementary nature of coercivity enhancement and exchange bias isgeneralized from the layered systems to ferro-antiferromagnet (F-AF) exchangecoupled systems with arbitrary configurations and is proved based on thecoherent rotation of the F magnetization. In the proof, the effect of F-AFcoupling is absorbed into the anisotropy of the F part, resulting in anarbitrary anisotropy for the F part. The proof starts from a general discussionon the initial susceptibility of a single domain particle. Then the fundamentalcorrelation between the maximal initial susceptibility and the critical fieldalong an arbitrary easy direction of a single domain particle, at which themagnetization becomes unstable, is discussed. Finally, the difference of theinitial switching field and the actual switching field along the arbitrarilychosen easy direction is discussed.Comment: 32 pages, 4 figure
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom