Using Magnetic Droplet Nucleation to Determine the Spin Torque Efficiency and Asymmetry in Cox(Ni,Fe)1−x Thin Films

2018 ◽  
Vol 10 (5) ◽  
Author(s):  
Sheng Jiang ◽  
Sunjae Chung ◽  
Quang Tuan Le ◽  
Hamid Mazraati ◽  
Afshin Houshang ◽  
...  
Keyword(s):  
Thin Films ◽  
Spin Torque ◽  
Droplet Nucleation ◽  
Magnetic Droplet

scholarly journals Erratum: Magnetic droplet nucleation boundary in orthogonal spin-torque nano-oscillators

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Sunjae Chung ◽  
Anders Eklund ◽  
Ezio Iacocca ◽  
Seyed Majid Mohseni ◽  
Sohrab R. Sani ◽  
...  
Keyword(s):  
Spin Torque ◽  
Droplet Nucleation ◽  
Magnetic Droplet

scholarly journals Optical and magneto-optical properties of GdxFe(100-x) thin films close to the compensation point

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Eva Jesenská ◽  
Takayuki Ishibashi ◽  
Lukáš Beran ◽  
Martin Pavelka ◽  
Jaroslav Hamrle ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spectral Dependence ◽  
Room Temperature ◽  
Magnetic Moments ◽  
Perpendicular Magnetic Anisotropy ◽  
Theoretical Models ◽  
Compensation Point ◽  
Spin Torque ◽  
Dc Sputtering

Abstract Unlike ferromagnetic materials, ferrimagnetic metals have recently received considerable attention due to their bulk perpendicular magnetic anisotropy, low net magnetization and tunable magnetic properties. This makes them perfect candidates for the research of recently discovered spin-torque related phenomena. Among other ferrimagnetic metals, GdFe has an advantage in relatively large magnetic moments in both sublattices and tunability of compensation point above the room temperature by small changes in its composition. We present a systematic study of optical and magneto-optical properties of amorphous GdxFe(100-x) thin films of various compositions (x = 18.3, 20.0, 24.7, 26.7) prepared by DC sputtering on thermally oxidized SiO2 substrates. A combination of spectroscopic ellipsometry and magneto-optical spectroscopy in the photon energy range from 1.5 to 5.5 eV with advanced theoretical models allowed us to deduce the spectral dependence of complete permittivity tensors across the compensation point. Such information is important for further optical detection of spin related phenomena driven by vicinity of compensation point in nanostructures containing GdFe.

scholarly journals Theory of Magnetodynamics Induced by Spin Torque in Perpendicularly Magnetized Thin Films

2005 ◽  
Vol 95 (26) ◽  
Author(s):  
M. A. Hoefer ◽  
M. J. Ablowitz ◽  
B. Ilan ◽  
M. R. Pufall ◽  
T. J. Silva
Keyword(s):  
Thin Films ◽  
Spin Torque

scholarly journals Magnetic droplet nucleation boundary in orthogonal spin-torque nano-oscillators

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Sunjae Chung ◽  
Anders Eklund ◽  
Ezio Iacocca ◽  
Seyed Majid Mohseni ◽  
Sohrab R. Sani ◽  
...  
Keyword(s):  
Critical Role ◽  
Perpendicular Magnetic Anisotropy ◽  
Accurate Method ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Torque ◽  
Droplet Nucleation ◽  
Wide Range ◽  
Field Plane

Abstract Static and dynamic magnetic solitons play a critical role in applied nanomagnetism. Magnetic droplets, a type of non-topological dissipative soliton, can be nucleated and sustained in nanocontact spin-torque oscillators with perpendicular magnetic anisotropy free layers. Here, we perform a detailed experimental determination of the full droplet nucleation boundary in the current–field plane for a wide range of nanocontact sizes and demonstrate its excellent agreement with an analytical expression originating from a stability analysis. Our results reconcile recent contradicting reports of the field dependence of the droplet nucleation. Furthermore, our analytical model both highlights the relation between the fixed layer material and the droplet nucleation current magnitude, and provides an accurate method to experimentally determine the spin transfer torque asymmetry of each device.

scholarly journals Magnetic droplet solitons in orthogonal nano-contact spin torque oscillators

2014 ◽  
Vol 435 ◽  
pp. 84-87 ◽  
Author(s):  
S.M. Mohseni ◽  
S.R. Sani ◽  
R.K. Dumas ◽  
J. Persson ◽  
T.N. Anh Nguyen ◽  
...  
Keyword(s):  
Spin Torque ◽  
Magnetic Droplet ◽  
Spin Torque Oscillators

scholarly journals Magnetic droplet nucleation with a homochiral Néel domain wall

2017 ◽  
Vol 95 (22) ◽  
Author(s):  
Sanghoon Kim ◽  
Peong-Hwa Jang ◽  
Duck-Ho Kim ◽  
Mio Ishibashi ◽  
Takuya Taniguchi ◽  
...  
Keyword(s):  
Domain Wall ◽  
Droplet Nucleation ◽  
Néel Domain Wall ◽  
Magnetic Droplet

Determination of perpendicular magnetic anisotropy based on the magnetic droplet nucleation

2018 ◽  
Vol 57 (5) ◽  
pp. 050308 ◽  
Author(s):  
Tomoe Nishimura ◽  
Duck-Ho Kim ◽  
Takaya Okuno ◽  
Yuushou Hirata ◽  
Yasuhiro Futakawa ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Droplet Nucleation ◽  
Magnetic Droplet
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