Journal ArticleDOI
New Magnetic Anisotropy
W. H. Meiklejohn,C. P. Bean +1 more
Reads0
Chats0
TLDR
In this article, a new type of magnetic anisotropy was discovered which is best described as an exchange anisotropic, which is the result of an interaction between an antiferromagnetic material and a ferromagnetic materials.Abstract:
A new type of magnetic anisotropy has been discovered which is best described as an exchange anisotropy. This anisotropy is the result of an interaction between an antiferromagnetic material and a ferromagnetic material. The material that exhibits this exchange anisotropy is a compact of fine particles of cobalt with a cobaltous oxide shell. The effect occurs only below the N\'eel temperature of the antiferromagnetic material, which is essentially room temperature for the cobaltous oxide. An exchange torque is inferred to exist between the metal and oxide which has a maximum value at 77\ifmmode^\circ\else\textdegree\fi{}K of \ensuremath{\sim}2 dyne-cm/${\mathrm{cm}}^{2}$ of interface.read more
Citations
More filters
Journal ArticleDOI
Ferromagnetic resonance investigation in as-prepared NiFe/FeMn/NiFe trilayer
TL;DR: In this paper, the isotropic in-plane resonance field shift is negative for the bottom NiFe layer, while positive for the top NiFe layers, respectively, due to the negative interfacial perpendicular anisotropy at NiFe/FeMn/NiFe interface.
Journal ArticleDOI
Exchange-biased oxide-based core–shell nanoparticles produced by seed-mediated growth in polyol
Thomas Gaudisson,Laurence Ourry,Hussein Hammoud,Hussein Hammoud,Sophie Nowak,Nicolas Menguy,Nader Yaacoub,Jean-Marc Greneche,Fayna Mammeri,Souad Ammar +9 more
TL;DR: In this paper, the synthesis of magnetically contrasted oxide-based core-shell nanoparticles using the polyol process was reported, which appeared to be of a very high crystalline quality with a perfect epitaxy between the spinel-like iron oxide core and the rock-salt-like cobalt monoxide shell, leading to substantial exchange bias at low temperatures.
Journal ArticleDOI
Temperature dependence of exchange biased thin films
TL;DR: In this paper, the authors explore a model which allows for imperfectly compensated interfaces due to interface roughness and calculate the spin configurations and hysteresis curves as a function of temperature.
Journal ArticleDOI
Imaging uncompensated moments and exchange-biased emergent ferromagnetism in FeRh thin films
Isaiah Gray,Gregory M. Stiehl,John T. Heron,Antonio B. Mei,Darrell G. Schlom,Ramamoorthy Ramesh,Daniel C. Ralph,Gregory D. Fuchs +7 more
TL;DR: In this article, the authors used magneto-thermal microscopy to image uncompensated moments in thin films of FeRh, a room-temperature antiferromagnet that exhibits a 1st-order phase transition to a ferromagnetic state near 100~$^\circ$C.
Journal ArticleDOI
Large Exchange Bias Field in (Pt/Co) $_{\bf 3}$ /IrMn/Co Trilayers With Ultrathin IrMn Layers
TL;DR: In this paper, it was shown that the critical IrMn thickness can be reduced by sandwiching the IRMn layer between two F layers or multilayers having parallel or orthogonal anisotropy, i.e., the first being magnetized in plane and the second out of plane.