TY - JOUR PB - American Physical Society ID - 10.1103/PhysRevFocus.20.13 TI - Nobel Focus: Sensitive Magnetic Sandwich JF - Physical Review Focus JA - Phys. Rev. Focus J1 - FOCUS VL - 20 IS - SP - 13 EP - PY - 2007/10/15/ UR - http://link.aps.org/doi/10.1103/PhysRevFocus.20.13 A1 - Monroe, Don ER -