Journal ArticleDOI
New Magnetic Anisotropy
W. H. Meiklejohn,C. P. Bean +1 more
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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
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Effect of underlayer roughness, grain size, and crystal texture on exchange coupled IrMn/CoFe thin films
TL;DR: In this article, the exchange bias field (Hex) between a ferromagnetic and antiferromagnetic film has been found to be sensitive to interface roughness, crystalline texture, and grain size.
Journal ArticleDOI
Effect of magnetism on the ethanol sensitivity of undoped and Mn-doped CuO nanoflakes
R. N. Mariammal,K. Ramachandran,G. Kalaiselvan,Sonachalam Arumugam,B. Renganathan,Dillibabu Sastikumar +5 more
TL;DR: In this article, the authors showed that the number of defects, which has significant influence on both the magnetic and ethanol sensing properties is more in undoped CuO than in Mn-doped (5 and 10 at.%) monoclinic CuO nanoflakes.
Journal ArticleDOI
Magnetic properties of ultrafine Co particles
TL;DR: In this paper, the effect of exchange interactions between the antiferromagnetic Co-oxide shell and the ferromagnetic co core on the magnetic behavior of the powders has been investigated.
Journal ArticleDOI
Exchange bias switching in an antiferromagnet/ferromagnet bilayer driven by spin–orbit torque
Shouzhong Peng,Daoqian Zhu,Weixiang Li,Hao Wu,Alexander J. Grutter,Dustin A. Gilbert,Dustin A. Gilbert,Jiaqi Lu,Danrong Xiong,Wenlong Cai,Padraic Shafer,Kang L. Wang,Weisheng Zhao +12 more
TL;DR: In this article, the current-induced switching of the exchange bias field in a perpendicularly magnetized IrMn/CoFeB bilayer structure using a spin-orbit torque generated in the antiferromagnetic IRMn layer was reported.
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Magnetic exchange bias of more than 1 Tesla in a natural mineral intergrowth
Suzanne A. McEnroe,Brian Carter-Stiglitz,Richard J. Harrison,Peter Robinson,Karl Fabian,Catherine McCammon +5 more
TL;DR: It is demonstrated that exchange bias in this system is due to the interaction between coherently intergrown magnetic phases formed through a natural process of phase separation during slow cooling over millions of years.