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You searched on: Topic Area: Nanomagnetics

Displaying records 1 to 10 of 220 records.
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1. Probing electric field control of magnetism using ferromagnetic resonance
Topic: Nanomagnetics
Published: 1/29/2015
Authors: Ziyao Zhou, Morgan Trassin, Ya Gao, Yuan Gao, Diana Qiu, Khalid Ashraf, Tianxiang Nan, Xi Yang, Samuel R. Bowden, Daniel Thornton Pierce, Mark D Stiles, John Unguris, Ming Liu, Brandon Howe, Gail Brown, Sayeef Salahuddin, Ramamoorthy Ramesh, Nian Sun
Abstract: A question of fundamental importance in multiferroic materials, such as BiFeO3, is whether the canted moment arising from the Dzyalozhinski-Moriya coupling is switchable with the application of an electric field. Since this canted moment is weak, dir ...

2. Magnetic structure and anisotropy of [Co/Pd]_5/NiFe multilayers
Topic: Nanomagnetics
Published: 1/9/2015
Authors: Larysa Tryputen, Feng Guo, Liu Frank, T. N. Anh Nguyen, Majid Mohseni, Sunjae Chung, Yeyu Fang, Johan Akerman, Robert D McMichael, Caroline Ross
Abstract: The magnetization behavior, magnetic anisotropy and domain congurations of Co/Pd multilayers with perpendicular magnetic anisotropy capped with permalloy is investigated using magnetometry, magnetic force microscopy and ferromagnetic resonance. The ...

3. Dissipation due to pure spin current generated by spin pumping
Topic: Nanomagnetics
Published: 12/1/2014
Authors: Wayne M. Saslow, Tomohiro Taniguchi
Abstract: Based on spin-dependent transport theory and thermodynamics, we develop a generalized theory of the Joule heating in the presence of a spin current. Along with the conventional Joule heating consisting of an electric current and electro-chemical pote ...

4. Critical behavior of zero-field magnetic fluctuations in perpendicularly magnetized thin films
Topic: Nanomagnetics
Published: 11/4/2014
Authors: Andrew Lee Balk, Mark D Stiles, John Unguris
Abstract: We use video-rate magneto optical Kerr effect (MOKE) microscopy to study zero field magnetic fluctuations in a perpendicularly magnetized cobalt film at room temperature, prepared near a spin reorientation transition. Globally, the film has zero net ...

5. Parametric pumping of precession modes in ferromagnetic nanodisks
Topic: Nanomagnetics
Published: 3/26/2014
Authors: Feng Guo, Lyubov Belova, Robert D McMichael
Abstract: We report parametric excitation of magnetic precession modes in nanodisks using a parallel pumping configuration. The excitations are detected using a ferromagneitc resonance force microscopy method, and the parallel-pumped spectra reveal nonlinear c ...

6. Head and Media Challenges for 3 Tb/in^u2^ Microwave Assisted Magnetic Recording
Topic: Nanomagnetics
Published: 2/3/2014
Authors: Thomas J Silva, Justin M Shaw, Hans Toya Nembach, Mike Mallary, Kumar Srinivasan, Gerado Bertero, Dan Wolf, Christian Kaiser, Michael Chaplin, Mahendra Pakala, Leng Qunwen, Yiming Wang, Carl Elliot, Lui Francis
Abstract: A specific design for Microwave Assisted Magnetic Recording (MAMR) at about 3Tb/in^u2^ (0.47 Tb/cm^u2^ or 4.7 Pb/m^u2^) is discussed in detail to highlight the challenges of MAMR and to contrast its requirements with conventional Perpendicular Magnet ...

7. Field-driven sense elements for chirality-dependent domain wall detection and storage
Topic: Nanomagnetics
Published: 12/10/2013
Authors: Samuel R. Bowden, John Unguris
Abstract: A method for locally sensing and storing data of transverse domain wall chirality in planar nanowire logic and memory systems is presented. Patterned elements, in close proximity to the nanowires, respond to the asymmetry in the stray field from the ...

8. Chirality from interfacial spin-orbit coupling effects in magnetic bilayers
Topic: Nanomagnetics
Published: 11/19/2013
Authors: Kyoung-Whan Kim, Hyun-Woo Lee, Kyung Jin Lee, Mark D Stiles
Abstract: Spin-orbit coupling causes many properties that make magnets technologically important as well as properties that interfere with optimal performance. As nanomagnetic devices scale to smaller sizes, spin-orbit coupling due to the broken structural inv ...

9. Spin-Wave Propagation in the Presence of Interfacial Dzyaloshinskii-Moriya Interaction
Topic: Nanomagnetics
Published: 11/4/2013
Authors: Jung-Hwan Moon, Soo-Man Seo, Kyung Jin Lee, Kyoung-Whan Kim, Jisu Ryu, Hyun-Woo Lee, Robert D McMichael, Mark D Stiles
Abstract: In ferromagnetic thin films, broken inversion symmetry and spin-orbit coupling give rise to interfacial Dzyaloshinskii-Moriya interactions. Analytic expressions for spin-wave properties show that the Dzyaloshinskii-Moriya interaction leads to non-re ...

10. Self-consistent calculation of spin transport and magnetization dynamics
Topic: Nanomagnetics
Published: 10/10/2013
Authors: Kyung Jin Lee, Mark D Stiles, Hyun-Woo Lee, Jung-Hwan Moon, Kyoung-Whan Kim, Seo--Won Lee
Abstract: A spin-polarized current transfers its spin-angular momentum to a local magnetization, exciting various types of current-induced magnetization dynamics. So far, most studies in this field have focused on the direct effect of spin transport on magneti ...

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