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Nonlinear dynamics in physical systems provide a computational capability that is unique to reservoirs. It is, however, difficult to find an appropriate task for a reservoir because of the complexity of nonlinear information processing. The information processing capacity has recently been used to clarify systematically the tasks that are solved by reservoirs; it quantifies the memory capacity of reservoirs in accordance with the order of nonlinearity. Herein, an experimental evaluation of the information processing capacity of a spintronic oscillator consisting of nanostructured ferromagnets is reported. The spintronic reservoir state is electrically manipulated by adding a delayed\u2010feedback circuit. The total capacity reaches a maximum of 5.6 at the edge of the echo state property. A trade\u2010off between the linear and nonlinear components of the capacity is also found. The result can be used to better understand the nonlinear information processing in reservoirs and to find good matches between reservoirs and tasks. As an example, a function\u2010approximation task is performed and it is found that it can be efficiently solved when the reservoir state is appropriately tuned so that its information processing capacity matches that of the task.<\/jats:p>","DOI":"10.1002\/aisy.202300175","type":"journal-article","created":{"date-parts":[[2023,6,30]],"date-time":"2023-06-30T22:59:41Z","timestamp":1688165981000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["Information Processing Capacity of Spintronic Oscillator"],"prefix":"10.1002","volume":"5","author":[{"given":"Sumito","family":"Tsunegi","sequence":"first","affiliation":[{"name":"Research Center for Emerging Computing Technologies National Institute of Advanced Industrial Science and Technology (AIST)  Tsukuba Ibaraki 305-8568 Japan"},{"name":"PRESTO Japan Science and Technology Agency (JST)  Saitama 332-0012 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