Low-Temperature Glassy Response of Ultrathin Manganite Films to Electric   and Magnetic Fields
  The glassy response of thin films of La0.8Ca0.2MnO3 to external magnetic and gated electrostatic fields in a field-effect geometry has been studied at low temperatures. A hierarchical response with irreversible memory effects, non-ergodic time evolution, aging and annealing behavior of the resistance suggest that the dynamics are governed by strain relaxation for both electronic and magnetic perturbations. Cross-coupling of charge, spin, and strain have been exploited to tune the coercivity of an ultrathin manganite film by electrostatic gating. 
A. Bhattacharya, M. Eblen-Zayas, N. E. Staley, A. L. Kobrinskii, A. M.   Goldman