The weak ferroelectric contribution to the polarization of antiferroelectric lead zirconate (PZO) thin films has been investigated using PUND (Positive Up Negative Down) pulse measurements and hysterons decomposition by First Order Reversal Curves (FORC) technique. allows decomposing measured current, obtained from polarization-electric field loop measurements, into a switching non-switching co...

Section 2.1 below contains a brief introduction to the theory of C -algebras associated to graphs. Some examples are presented. Section 3 contains a discussion on stability of C -algebras. We make a digression to show that for any C -dynamical system (G; ;A) with G second countable, A separable and stable, the crossed product C -algebra A o G is stable. This generalizes [12, Corollary 4.5]. Sub...

METEORITES: INSIGHTS FROM MAGNETIC REMANENCE AND FIRST-ORDER REVERSAL CURVE (FORC) MEASUREMENTS. G. Acton 1 , Q.-Z. Yin 1 , K. L. Verosub 1 , and D. S. Ebel 2 , 1 Dept. of Geology, University of California, Davis, One Shields Avenue, Davis, CA 95616 (E-mail: [email protected], [email protected], [email protected]). 2 Department of Earth and Planetary Sciences, American M...

[1] Magnetostatic interactions have been investigated in an intergrown material consisting of 200-nm magnetite blocks separated by 30-nm-wide ulvöspinel lamellae. First-order reversal curve (FORC) measurements provide a direct measure of the interaction fields, giving a value for the full width at half maximum (FWHM) of 30 mT (at Hc = 20 mT). Hysteresis parameters are Mrs/Ms = 0.22, Hcr/Hc = 1....