Nonlinear frequency and amplitude modulation of a nanocontact-based spin-torque oscillator

作者：Muduli P K^*; Pogoryelov Ye; Bonetti S; Consolo G; Mancoff Fred; Akerman Johan

来源：Physical Review B, 2010, 81(14): 140408.

DOI：10.1103/PhysRevB.81.140408

We study the current-controlled modulation of a nanocontact spin-torque oscillator. Three principally different cases of frequency nonlinearity (d(2)f/dI(dc)(2) being zero, positive, and negative) are investigated. Standard nonlinear frequency-modulation theory is able to accurately describe the frequency shifts during modulation. However, the power of the modulated sidebands only agrees with calculations based on a recent theory of combined nonlinear frequency and amplitude modulation.

• 出版日期2010-4-1