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This dynamics is nonlinear and is due to the strong direct core-core coupling in the system, dominating energetically for small-signal excitation. We observe and explain the appearance of spin resonance modes, forbidden within linear dynamics, and discuss how they depend on the magnetic and morphological asymmetries in the samples.<\/jats:p>","DOI":"10.1063\/1.4944515","type":"journal-article","created":{"date-parts":[[2016,3,14]],"date-time":"2016-03-14T17:00:39Z","timestamp":1457974839000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":4,"title":["Static and dynamic properties of vortex pairs in asymmetric nanomagnets"],"prefix":"10.1063","volume":"6","author":[{"given":"B. 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