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Are diamonds a physicist’s best friend? Using specially engineered diamonds, scientists at the École Normale Supérieure de Cachan in France, in collaboration with researchers at the French National Center for Scientific Research (CNRS) and Paris-Sud University, have devised a new way to map the landscape for magnetic objects on the nanometer scale. The technique opens up many possibilities for more energy-efficient microelectronic devices and increased information storage in the near future. It seems diamonds may provide the glimmer of hope that proponents of this technology seek.