The magnetic domain wall width of La0.7Ca0.3MnO3 determined from a Fresnel defocus series

Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, UK.

1. INTRODUCTION

2. THEORY

3. EXPERIMENTAL METHOD

4. RESULTS

w = ^]jS2/Ka = 12 nm (using 7 = 5.37xl0‘22 J (Adams (2000)), /T = 3.6xl04 J/m 3 (Mathur et al (1999)) and a = 0.38 nm ) and we conclude that the wall is not unusually narrow.