Magnetoelectricity in multiferroically composed multilayers and multiglasses

resumo

Single-crystalline magnetoelectric (ME) antiferromagnetic Cr(2)O(3) exchange coupled to a ferromagnetic multilayer (Pt/Co/Pt)(n), n >= 1, represents a multiphase multiferroic material with sophisticated multifunctional properties. They comprise the possibility of switching the exchange bias (EB) of the ferromagnetic hysteresis loop via the linear ME effect of Cr(2)O(3), and to design MERAM and logic cells operating at room temperature. Quadratic and cubic ME effects - promoted by soft-mode quantum fluctuations - are observed at lowest order in ceramic Sr(0.98)Mn(0.02)TiO(3) at low temperatures. Dipolar and spin glass orders occur simultaneously on the Mn(2+) subsystem and form a multiglass by analogy with conventional multiferroics. (C) 2009 Elsevier B.V. All rights reserved.

palavras-chave

SUSCEPTIBILITY; CR2O3; FILMS

categoria

Materials Science; Physics

autores

Kleemann, W; Borisov, P; Shvartsman, VV; Bedanta, S; Tkach, A; Vilarinho, PM

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