Artificial Kagome Arrays of Nanomagnets: A Frozen Dipolar Spin Ice
  Magnetic frustration effects in artificial kagome arrays of nanomagnets are investigated using x-ray photoemission electron microscopy and Monte Carlo simulations. Spin configurations of demagnetized networks reveal unambiguous signatures of long range, dipolar interaction between the nanomagnets. As soon as the system enters the spin ice manifold, the kagome dipolar spin ice model captures the observed physics, while the short range kagome spin ice model fails. 
N. Rougemaille, F. Montaigne, B. Canals, A. Duluard, D. Lacour, M.   Hehn, R. Belkhou, O. Fruchart, S. El Moussaoui, A. Bend...
cond-mat.mes-hall