Ni metal is evaporated onto the tips of ZnO nanorods , creating magnetic‐metal/semiconductor heterostructures (see Figure). Accurate thickness control allows tunable magnetic properties in nanosized magnetic layers on individual nanorods due to a crossover from superparamagnetism to ferromagnetism. These magnetic building blocks have potential as components for nanoscale spin‐valve transistors, spin light‐emitting diodes, and nonvolatile storage and logic devices.
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Jung et al. (2003) studied this question.
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