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Search Publications by: Dustin Gilbert (Assoc)

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Displaying 26 - 50 of 52

Resolving Interfacial Charge Transfer in Titanate Superlattices using Resonant X-Ray Reflectometry

September 6, 2018
Author(s)
Ryan F. Need, P. B. Marshall, E. Weschke, Alexander J. Grutter, Dustin Allen Gilbert, E. Arenholz, P. Shafer, S. Stemmer, Stephen D. Wilson
Oxide interfaces, where strong electron-electron correlations lead to emergent phase behavior, have been the subject of intense study in recent years. However, the buried nature of heterointerfaces often makes them challenging to probe directly. Addressing

Strain-Induced Competition between Ferromagnetism and Emergent Antiferromagnetism in (Eu,Sr)MnO 3

September 4, 2018
Author(s)
Alexander J Grutter, Steven M. Disseler, E. J. Moon, Dustin Allen Gilbert, E. Arenholz, A. Suter, T. Prokscha, Z. Salman, Brian J Kirby, S. J. May
We demonstrate emergent antiferromagnetic interactions is strained thin films of the mixed valence manganite (Eu,SR)MnO 3. Although the composition studied, Eu 0.7Sr 0.3MnO 3, will nominally yield a ferromagnetic phase in bulk, we observe significant

Exchange-Biasing Topological Charges by Antiferromagnetism

July 17, 2018
Author(s)
Qing Lin He, Gen Yin, Alexander Grutter, Lei Pan, Xiaoyu Che, Guoqiang Yu, Dustin A. Gilbert, Steven M. Disseler, Yizhou Liu, Padraic Shafer, Bin Zhang, Yingying Wu, Brian Kirby, Elke Arenholz, Roger K. Lake, Xiaodong Han, Kang L. Wang, Xiaodong Han, Kang L. Wang
'Geometric' or 'topological' Hall effect is induced by the emergent gauge field experienced by the carriers adiabatically passing through chiral spin textures. This effect is an indication of non-trivial spin textures, such as magnetic skyrmions. Here we

Growth-Induced In-Plane Uniaxial Anisotropy V 2 O 3 /Ni Films

October 18, 2017
Author(s)
Dustin Allen Gilbert, Juan Gabriel Ramirez, T. Saerbeck, J. Trastoy, Ivan K. Schuller, Kai Liu, J. de la Venta
We report a microstructure-induced uniaxial anisotropy in V 2O 3/Ni hybrid thin films obtained from temperature and angular dependence of the magnetization. X-ray diffraction and reciprocal space maps identify the in-plane crystalline axes of the V 2O 3

First-Order Reversal Curves of the Magnetostructural Transition in FeTe

June 5, 2017
Author(s)
M. K. Frampton, J. Crocker, Dustin A. Gilbert, N. Curro, Kai Liu, J. A. Schneeloch, G. D. Gu, R. J. Zieve
We apply the first-order reversal curve (FORC) method, borrowed from studies of ferromagnetic materials, to the magneto-structural phase transition of Fe 1+yTe. FORC measurements reveal two features in the hysteretic phase transition, even in samples where

Magnetization Reversal of Three-Dimensional Nickel Anti-Sphere Arrays

December 23, 2016
Author(s)
Le Yu, Zhongying Yan, Han-Chang Yang, Xuzhao Chai, Bingqing Li, Sina Moeendarbari, Yaowu Hao, Di Zhang, Gang Feng, Ping Han, Dustin A. Gilbert, Kai Liu, Kristen S. Buchanan, Xuemei Cheng
Three-dimensional anti-sphere arrays (3DAAs) of Ni have been fabricated using electrochemical deposition into self-assembled polystyrene sphere templates, which offers the advantage of straightforward scalability. Using the first-order reversal curve (FORC

Concurrent Magnetic and Structural Reconstructions at the Interface of (111)-Oriented La 0.07 Sr 0.3 MnO 3 /LaFeO 3

November 21, 2016
Author(s)
I. Hallsteinsen, M. Moreau, Alexander Grutter, M. Nord, P.-E. Vullum, Dustin A. Gilbert, T. Bolstad, J. K. Grepstad, R. Holmestad, S. M. Selbach, A. T. N'Diaye, Brian Kirby, E. Arenholz, T. Tybell
We observe an induced switchable magnetic moment of 1.6 ± 0.40 υ B/Fe in the nominally antiferromagnetic LaFeOd3^/La 0.7Sr 0.3MnO 3/SrTiO 3(111). The magnetic reconstruction is driven by a mismatch of oxygen octahedra rotations resulting in an atomic

Magnetic Yoking and Tunable Interactions in FePt-Based Hard/Soft Bilayers

September 8, 2016
Author(s)
Dustin Allen Gilbert, Jung-Wei Liao, Brian J Kirby, Michael Winklhofer, Chih-Huang Lai, Kai Liu
Assessing and controlling magnetic interactions in magnetic nanostructures are critical to nanomagnetic and spintronic explorations, such as magnetic recording media, permanent magnets, magnetic memory and logic devices, etc. Here we demonstrate an

Lengthscale Effects on Exchange Coupling in Co-Pt Ll 0 +Ll 2 Nanochessboards

September 1, 2016
Author(s)
Eric P. Vetter, Liwei Geng, Priya Ghatwai, Dustin A. Gilbert, Yongmei Jin, William A. Soffa, Jerrold A. Floro
The Co-Pt nanochessboard is a quasi-periodic, nanocomposite tiling of Ll 0 and Ll 2 magnetic phases that offers a novel structure for the investigation of exchange coupling, relevant to permanent magnet applications. Periodicity of the tiling is controlled

Structural and Magnetic Depth Profiles of Magneto-Ionic Heterostructures Beyond the Interface Limit

July 22, 2016
Author(s)
Dustin A. Gilbert, Alexander J. Grutter, Elke Arenholz, Kai Liu, Brian J. Kirby, Julie A. Borchers, Brian B. Maranville
Electric-field control of magnetism provides a promising route towards ultralow power information storage and sensor technologies. The effects of magneto-ionic motion have so far been prominently featured in the direct modification of interface chemical

Controllable Positive Exchange Bias via Redox-Driven Oxygen Migration

March 21, 2016
Author(s)
Dustin A. Gilbert, Justin Olamit, Randy K. Dumas, Brian J. Kirby, Alexander J. Grutter, Brian B. Maranville, Elke Arenholz, Julie A. Borchers, Kai Liu
We have observed oxygen migration across buried interfaces in Gd^xdx^Fe 1-x/NiCoO films, which leads to tunable positive exchange bias over a relatively small cooling field range of 300 mT. The tunability is shown to be the result of an interfacial layer

Reversible Control of Magnetism in La 0.67 Sr 0.33 MnO 3 through Chemically-Induced Oxygen Migration

February 24, 2016
Author(s)
Alexander J. Grutter, Dustin A. Gilbert, U. S. Alaan, E. Arenholz, Brian B. Maranville, Julie A. Borchers, Y. Suzuki, Kai Liu, Brian J. Kirby
We demonstrate reversible control of magnetization and anisotropy in La 0.67Sr 0.33MnO 3 films through interfacial oxygen migration. Gd metal capping layers deposited onto La 0.67Sr 0.33MnO 3 leach Oxygen from the film through a solid-state redox reaction