Freestanding Positionable Microwave-Antenna Device for Magneto-Optical Spectroscopy Experiments

被引：10

作者：

Hache, T. ^{[1
,2
]}

Vanatka, M. ^{[3
]}

Flajsman, L. ^{[3
]}

Weinhold, T. ^{[1
,4
]}

Hula, T. ^{[1
,2
]}

Ciubotariu, O. ^{[5
]}

Albrecht, M. ^{[5
]}

Arkook, B. ^{[6
]}

Barsukov, I ^{[6
]}

Fallarino, L. ^{[1
]}

Hellwig, O. ^{[1
,2
]}

Fassbender, J. ^{[1
,4
]}

Urbanek, M. ^{[3
]}

Schultheiss, H. ^{[1
,4
]}

机构：

[1] Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, Bautzner Landstr 400, D-01328 Dresden, Germany

[2] Tech Univ Chemnitz, Inst Phys, D-09107 Chemnitz, Germany

[3] Brno Univ Technol, CEITEC BUT, Purkynova 123, Brno 61200, Czech Republic

[4] Tech Univ Dresden, D-01062 Dresden, Germany

[5] Univ Augsburg, Inst Phys, Uni Str 1, D-86135 Augsburg, Germany

[6] Univ Calif Riverside, Phys & Astron, Riverside, CA 92521 USA

来源：

PHYSICAL REVIEW APPLIED | 2020年 / 13卷 / 05期

基金：

美国国家科学基金会;

关键词：

SPIN; DRIVEN; EMISSION;

D O I：

10.1103/PhysRevApplied.13.054009

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Modern spectroscopic techniques for the investigation of magnetization dynamics in micro and nanostructures or thin films typically use microwave antennas. They are directly fabricated on top of the sample by means of electron-beam lithography (EBL). Following this approach, every magnetic structure on the sample needs its own antenna, resulting in additional EBL steps and layer-deposition processes. Here, we demonstrate an approach for magnetization excitation that is suitable for optical and nonoptical spectroscopy techniques. By patterning the antenna on a separate flexible glass cantilever and insulating it electrically, we solve the mentioned issues. Since we use flexible transparent glass as the antenna substrate, optical spectroscopy techniques like microfocused Brillouin-light-scattering microscopy (mu BLS), time-resolved magneto-optical Kerr-effect measurements, or optically detected magnetic resonance measurements can be carried out at visible laser wavelengths. As the antenna is detached from the sample it can be freely positioned in all three dimensions to address only the desired magnetic structures and to achieve an effective excitation. We demonstrate the functionality of these antennas using mu BLS and compare coherently and thermally excited magnon spectra to reveal an enhancement of the signal by a factor of about 400 due to the strong excitation by the antenna. Moreover, we succeed in characterizing yttrium-iron-garnet thin films with spatial resolution using optical ferromagnetic resonance experiments. We analyze the spatial excitation profile of the antenna by measuring the magnetization dynamics in two dimensions. The technique is furthermore applied to investigate injection locking of spin Hall nano-oscillators in the most favourable geometry with the highest spin-torque efficiency.

引用

页数：10

共 42 条

[1] Electric manipulation of spin relaxation using the spin Hall effect [J].

Ando, K. ;

Takahashi, S. ;

Harii, K. ;

Sasage, K. ;

Ieda, J. ;

Maekawa, S. ;

Saitoh, E. .

PHYSICAL REVIEW LETTERS, 2008, 101 (03)

[2] Direct Excitation of Propagating Spin Waves by Focused Ultrashort Optical Pulses [J].

Au, Y. ;

Dvornik, M. ;

Davison, T. ;

Ahmad, E. ;

Keatley, P. S. ;

Vansteenkiste, A. ;

Van Waeyenberge, B. ;

Kruglyak, V. V. .

PHYSICAL REVIEW LETTERS, 2013, 110 (09)

[3]

Awad AA, 2017, NAT PHYS, V13, P292, DOI [10.1038/nphys3927, 10.1038/NPHYS3927]

[4] Field-dependent perpendicular magnetic anisotropy in CoFeB thin films [J].

Barsukov, I. ;

Fu, Yu ;

Goncalves, A. M. ;

Spasova, M. ;

Farle, M. ;

Sampaio, L. C. ;

Arias, R. E. ;

Krivorotov, I. N. .

APPLIED PHYSICS LETTERS, 2014, 105 (15)

[5] Emission of spin waves by a magnetic multilayer traversed by a current [J].

Berger, L .

PHYSICAL REVIEW B, 1996, 54 (13) :9353-9358

[6] Magnon detection using a ferroic collinear multilayer spin valve [J].

Cramer, Joel ;

Fuhrmann, Felix ;

Ritzmann, Ulrike ;

Gall, Vanessa ;

Niizeki, Tomohiko ;

Ramos, Rafael ;

Qiu, Zhiyong ;

Hou, Dazhi ;

Kikkawa, Takashi ;

Sinova, Jairo ;

Nowak, Ulrich ;

Saitoh, Eiji ;

Klaeui, Mathias .

NATURE COMMUNICATIONS, 2018, 9

[7] Nanoconstriction-based spin-Hall nano-oscillator [J].

Demidov, V. E. ;

Urazhdin, S. ;

Zholud, A. ;

Sadovnikov, A. V. ;

Demokritov, S. O. .

APPLIED PHYSICS LETTERS, 2014, 105 (17)

[8] Synchronization of spin Hall nano-oscillators to external microwave signals [J].

Demidov, V. E. ;

Ulrichs, H. ;

Gurevich, S. V. ;

Demokritov, S. O. ;

Tiberkevich, V. S. ;

Slavin, A. N. ;

Zholud, A. ;

Urazhdin, S. .

NATURE COMMUNICATIONS, 2014, 5

[9]

Demidov VE, 2012, NAT MATER, V11, P1028, DOI [10.1038/NMAT3459, 10.1038/nmat3459]

[10] Nanowire spin torque oscillator driven by spin orbit torques [J].

Duan, Zheng ;

Smith, Andrew ;

Yang, Liu ;

Youngblood, Brian ;

Lindner, Juergen ;

Demidov, Vladislav E. ;

Demokritov, Sergej O. ;

Krivorotov, Ilya N. .

NATURE COMMUNICATIONS, 2014, 5

← 1 2 3 4 5 →