"Interplay between intrinsic and stacking-fault magnetic domains in bi-layered manganites "

M. A. Hossain,: Mark H. Burkhardt, S. Sarkar, H. Ohldag, Y.-D. Chuang, A. Scholl, A. T. Young, A. Doran, D. S. Dessau, H. Zheng, J. F. Mitchell, H. A. Dürr and J. Stöhr; Applied Physics Letters, 09/24/12.

Additional Authors: Mark H. Burkhardt, S. Sarkar, H. Ohldag, Y.-D. Chuang, A. Scholl, A. T. Young, A. Doran, D. S. Dessau, H. Zheng, J. F. Mitchell, H. A. Dürr and J. Stöhr

Abstract:

We present a low temperature x-ray photoemission electron microscopy study of the bi-layered
manganite compound La1:2Sr1:8Mn2O7 (BL-LSMO) to investigate the influence of stacking faults,
which are structurally and magnetically different from the bi-layered host. In BL-LSMO, small
magnetic moment persists to T ¼ 300 K, well above the Curie temperature of 120K (TC). Our
magnetic images show that 3D stacking faults are responsible for the T transition. Furthermore,
close to the TC, stacking faults are well coupled to the bi-layered host with latter magnetic domains
controlling the spin direction of the stacking faults. Contrary to recent reports, we find that stacking
faults do not seed magnetic domains in the host via an exchange spring mechanism and the
intrinsic TC of the BL-LSMO is not lower than 120 K.