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O. Hellwig
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Journal Articles

Erratum: “Ultrafast laser generated strain in granular and continuous FePt thin films” [Appl. Phys. Lett. 113 , 123101 (2018)]

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A. von Reppert, L. Willig, J.-E. Pudell, M. Rössle, W. Leitenberger, M. Herzog, F. Ganss, O. Hellwig, M. Bargheer
Journal: Applied Physics Letters
Appl. Phys. Lett. 117, 049902 (2020)
https://doi.org/10.1063/5.0022340
Published: July 2020
View articletitled, Erratum: “Ultrafast laser generated strain in granular and continuous FePt thin films” [Appl. Phys. Lett. 113 , 123101 (2018)]
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Journal Articles

Bipolar spin Hall nano-oscillators

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T. Hache, Y. Li, T. Weinhold, B. Scheumann, F. J. T. Gonçalves, O. Hellwig, J. Fassbender, H. Schultheiss
Journal: Applied Physics Letters
Appl. Phys. Lett. 116, 192405 (2020)
https://doi.org/10.1063/5.0008988
Published: May 2020
View articletitled, Bipolar spin Hall nano-oscillators
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Journal Articles

Combined frequency and time domain measurements on injection-locked, constriction-based spin Hall nano-oscillators

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T. Hache, T. Weinhold, K. Schultheiss, J. Stigloher, F. Vilsmeier, C. Back, S. S. P. K. Arekapudi, O. Hellwig, J. Fassbender, H. Schultheiss
Journal: Applied Physics Letters
Appl. Phys. Lett. 114, 102403 (2019)
https://doi.org/10.1063/1.5082692
Published: March 2019
View articletitled, Combined frequency and time domain measurements on injection-locked, constriction-based spin Hall nano-oscillators
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Journal Articles

Ultrafast laser generated strain in granular and continuous FePt thin films

Open Access
A. von Reppert, L. Willig, J.-E. Pudell, M. Rössle, W. Leitenberger, M. Herzog, F. Ganss, O. Hellwig, M. Bargheer
Journal: Applied Physics Letters
Appl. Phys. Lett. 113, 123101 (2018)
https://doi.org/10.1063/1.5050234
Published: September 2018
View articletitled, Ultrafast laser generated strain in granular and continuous FePt thin films
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Journal Articles

Thermally induced magnetic switching in bit-patterned media

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B. Pfau, C. M. Günther, T. Hauet, S. Eisebitt, O. Hellwig
Journal: Journal of Applied Physics
J. Appl. Phys. 122, 043907 (2017)
https://doi.org/10.1063/1.4992808
Published: July 2017
View articletitled, Thermally induced magnetic switching in bit-patterned media
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Journal Articles

Helicity and field dependent magnetization dynamics of ferromagnetic Co/Pt multilayers

Open Access
Yu. Tsema, G. Kichin, O. Hellwig, V. Mehta, A. V. Kimel, A. Kirilyuk, Th. Rasing
Journal: Applied Physics Letters
Appl. Phys. Lett. 109, 072405 (2016)
https://doi.org/10.1063/1.4961246
Published: August 2016
View articletitled, Helicity and field dependent magnetization dynamics of ferromagnetic Co/Pt multilayers
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Journal Articles

Atomic resolution strain analysis in highly textured FePt thin films

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S. Wicht, S. H. Wee, O. Hellwig, V. Mehta, S. Jain, D. Weller, B. Rellinghaus
Journal: Journal of Applied Physics
J. Appl. Phys. 119, 115301 (2016)
https://doi.org/10.1063/1.4943936
Published: March 2016
View articletitled, Atomic resolution strain analysis in highly textured FePt thin films
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Journal Articles

Modification of the structural and magnetic properties of granular FePt films by seed layer conditioning

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S. Wicht, V. Neu, L. Schultz, V. Mehta, S. Jain, J. Reiner, O. Mosendz, O. Hellwig, D. Weller, B. Rellinghaus
Journal: Journal of Applied Physics
J. Appl. Phys. 117, 013907 (2015)
https://doi.org/10.1063/1.4905422
Published: January 2015
View articletitled, Modification of the structural and magnetic properties of granular FePt films by seed layer conditioning
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Journal Articles

Optically induced spin wave dynamics in [Co/Pd]8 antidot lattices with perpendicular magnetic anisotropy

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S. Pal, J. W. Klos, K. Das, O. Hellwig, P. Gruszecki, M. Krawczyk, A. Barman
Journal: Applied Physics Letters
Appl. Phys. Lett. 105, 162408 (2014)
https://doi.org/10.1063/1.4898774
Published: October 2014
View articletitled, Optically induced spin wave dynamics in [Co/Pd]8 antidot lattices with perpendicular magnetic anisotropy
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Journal Articles

Influence of stray fields on the switching-field distribution for bit-patterned media based on pre-patterned substrates

Open Access
B. Pfau, C. M. Günther, E. Guehrs, T. Hauet, T. Hennen, S. Eisebitt, O. Hellwig
Journal: Applied Physics Letters
Appl. Phys. Lett. 105, 132407 (2014)
https://doi.org/10.1063/1.4896982
Published: October 2014
View articletitled, Influence of stray fields on the switching-field distribution for bit-patterned media based on pre-patterned substrates
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Journal Articles

Measurement of the Curie temperature distribution in FePt granular magnetic media

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S. Pisana, S. Jain, J. W. Reiner, G. J. Parker, C. C. Poon, O. Hellwig, B. C. Stipe
Journal: Applied Physics Letters
Appl. Phys. Lett. 104, 162407 (2014)
https://doi.org/10.1063/1.4873543
Published: April 2014
View articletitled, Measurement of the Curie temperature distribution in FePt granular magnetic media
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Journal Articles

Prevention of dewetting during annealing of FePt films for bit patterned media applications

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A. T. McCallum, D. Kercher, J. Lille, D. Weller, O. Hellwig
Journal: Applied Physics Letters
Appl. Phys. Lett. 101, 092402 (2012)
https://doi.org/10.1063/1.4748162
Published: August 2012
View articletitled, Prevention of dewetting during annealing of FePt films for bit patterned media applications
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Journal Articles

Time-resolved measurement of spin-wave spectra in CoO capped [Co(t)/Pt(7Å)]n-1 Co(t) multilayer systems

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S. Pal, B. Rana, S. Saha, R. Mandal, O. Hellwig, J. Romero-Vivas, S. Mamica, J. W. Klos, M. Mruczkiewicz, M. L. Sokolovskyy, M. Krawczyk, A. Barman
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 111, 07C507 (2012)
https://doi.org/10.1063/1.3672857
Published: February 2012
View articletitled, Time-resolved measurement of spin-wave spectra in CoO capped [Co(t)/Pt(7Å)]n-1 Co(t) multilayer systems
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Journal Articles

Observations of laser induced magnetization dynamics in Co/Pd multilayers with coherent x-ray scattering

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B. Wu, D. Zhu, Y. Acremann, T. A. Miller, A. M. Lindenberg, O. Hellwig, J. Stöhr, A. Scherz
Journal: Applied Physics Letters
Appl. Phys. Lett. 99, 252505 (2011)
https://doi.org/10.1063/1.3670305
Published: December 2011
View articletitled, Observations of laser induced magnetization dynamics in Co/Pd multilayers with coherent x-ray scattering
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Journal Articles

Origin of magnetic switching field distribution in bit patterned media based on pre-patterned substrates

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B. Pfau, C. M. Günther, E. Guehrs, T. Hauet, H. Yang, L. Vinh, X. Xu, D. Yaney, R. Rick, S. Eisebitt, O. Hellwig
Journal: Applied Physics Letters
Appl. Phys. Lett. 99, 062502 (2011)
https://doi.org/10.1063/1.3623488
Published: August 2011
View articletitled, Origin of magnetic switching field distribution in bit patterned media based on pre-patterned substrates
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Journal Articles

L 1 FePt based exchange coupled composite bit patterned films

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A. T. McCallum, P. Krone, F. Springer, C. Brombacher, M. Albrecht, E. Dobisz, M. Grobis, D. Weller, O. Hellwig
Journal: Applied Physics Letters
Appl. Phys. Lett. 98, 242503 (2011)
https://doi.org/10.1063/1.3599573
Published: June 2011
View articletitled, L 1 FePt based exchange coupled composite bit patterned films
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Journal Articles

Influence of ion irradiation on switching field and switching field distribution in arrays of Co/Pd-based bit pattern media

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T. Hauet, O. Hellwig, S.-H. Park, C. Beigné, E. Dobisz, B. D. Terris, D. Ravelosona
Journal: Applied Physics Letters
Appl. Phys. Lett. 98, 172506 (2011)
https://doi.org/10.1063/1.3581896
Published: April 2011
View articletitled, Influence of ion irradiation on switching field and switching field distribution in arrays of Co/Pd-based bit pattern media
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Journal Articles

Ferrimagnetic stripe domain formation in antiferromagnetically-coupled Co/Pt–Co/Ni–Co/Pt multilayers studied via soft x-ray techniques

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O. Hellwig, C. M. Günther, F. Radu, A. Menzel, W. F. Schlotter, J. Lüning, S. Eisebitt
Journal: Applied Physics Letters
Appl. Phys. Lett. 98, 172503 (2011)
https://doi.org/10.1063/1.3583454
Published: April 2011
View articletitled, Ferrimagnetic stripe domain formation in antiferromagnetically-coupled Co/Pt–Co/Ni–Co/Pt multilayers studied via soft x-ray techniques
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Journal Articles

Anisotropy measurements of FePt thin films

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H. J. Richter, O. Hellwig, S. Florez, C. Brombacher, M. Albrecht
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 109, 07B713 (2011)
https://doi.org/10.1063/1.3536459
Published: March 2011
View articletitled, Anisotropy measurements of FePt thin films
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Journal Articles

Probing the time-dependent switching probability of individual patterned magnetic islands

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F. Springer, O. Hellwig, E. Dobisz, M. Albrecht, M. Grobis
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 109, 07B905 (2011)
https://doi.org/10.1063/1.3540574
Published: March 2011
View articletitled, Probing the time-dependent switching probability of individual patterned magnetic islands
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