H
Heinz Siegwart
Researcher at IBM
Publications - 43
Citations - 1653
Heinz Siegwart is an academic researcher from IBM. The author has contributed to research in topics: Epitaxy & Thin film. The author has an hindex of 19, co-authored 42 publications receiving 1481 citations.
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Journal ArticleDOI
Direct observation of the alignment of ferromagnetic spins by antiferromagnetic spins
F. Nolting,Andreas Scholl,Joachim Stöhr,Jin Won Seo,Jean Fompeyrine,Heinz Siegwart,Jean-Pierre Locquet,Simone Anders,Jan Lüning,Eric E. Fullerton,Michael F. Toney,M. R. Scheinfein,Howard A. Padmore +12 more
TL;DR: P polarization-dependent X-ray magnetic dichroism spectro-microscopy is presented that reveals the micromagnetic structure on both sides of a ferromagnetic–antiferromagnetic interface, implying that the alignment of the ferrom magnetic spins is determined, domain by domain, by the spin directions in the underlying antiferromagnet layer.
Journal ArticleDOI
Observation of antiferromagnetic domains in epitaxial thin films
Andreas Scholl,Joachim Stöhr,Jan Lüning,Jin Won Seo,Jean Fompeyrine,Heinz Siegwart,Jean-Pierre Locquet,Frithjof Nolting,Simone Anders,Eric E. Fullerton,M. R. Scheinfein,Howard A. Padmore +11 more
TL;DR: These studies open the door for a microscopic understanding of the magnetic coupling across antiferromagnetic-ferromagnetic interfaces.
Journal ArticleDOI
Field-effect transistors with SrHfO3 as gate oxide
C. Rossel,B. Mereu,Chiara Marchiori,Daniele Caimi,M. Sousa,A Guiller,Heinz Siegwart,Roland Germann,Jean-Pierre Locquet,Jean Fompeyrine,David J. Webb,Ch. Dieker,Jin Won Seo +12 more
TL;DR: In this article, the authors demonstrate that the compound SrHfO3 grown epitaxially on Si(100) by molecular-beam epitaxy is a potential gate dielectric to fabricate n- and p-metaloxide semiconductor field effect transistors with equivalent oxide thickness (EOT) below 1nm.
Journal ArticleDOI
An integrated optical modulator operating at cryogenic temperatures.
Felix Eltes,Gerardo E. Villarreal-Garcia,Daniele Caimi,Heinz Siegwart,Antonio Gentile,Andy Hart,Pascal Stark,Graham D. Marshall,Mark G. Thompson,Jorge Barreto,Jean Fompeyrine,Stefan Abel +11 more
TL;DR: Electro-optic switching and modulation from room temperature down to 4 K is demonstrated by using the Pockels effect in integrated barium titanate (BaTiO3) devices, removing major roadblocks for the realization of cryogenic-compatible systems in the field of quantum computing, supercomputing and sensing.
Journal ArticleDOI
Optical properties of epitaxial SrHfO3 thin films grown on Si
M. Sousa,C. Rossel,Chiara Marchiori,Heinz Siegwart,Daniele Caimi,Jean-Pierre Locquet,David J. Webb,Roland Germann,J. Fompeyrine,Katherina Babich,Jin Won Seo,Ch. Dieker +11 more
TL;DR: In this article, perovskite thin films of SrHfO3 were grown by molecular beam epitaxy and compared with SrTiO3 films using spectroscopic ellipsometry and analyzed with respect to their structural properties characterized by x-ray diffractometry, atomic force microscopy, and transmission electron microscopy.