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Direct TEM observation of nanometric-sized defects in neutron-irradiated MgB2 bulk and their effect on pinning mechanisms, Martinelli, A, Tarantini, C, Lehmann, E, Manfrinetti, P, Palenzona, A, Pallecchi, I, Putti, M, Ferdeghini, C
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Martinelli et al. (2007) studied this question.
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