J
Jonathan Logan
Researcher at Argonne National Laboratory
Publications - 9
Citations - 3116
Jonathan Logan is an academic researcher from Argonne National Laboratory. The author has contributed to research in topics: Domain wall (magnetism) & Antiferromagnetism. The author has an hindex of 4, co-authored 8 publications receiving 2979 citations. Previous affiliations of Jonathan Logan include University of Chicago & University of Florida.
Papers
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Journal ArticleDOI
Transparent, Conductive Carbon Nanotube Films
Zhuangchun Wu,Zhihong Chen,Xu Du,Jonathan Logan,Jennifer Sippel,Maria Nikolou,Katalin Kamarás,John R. Reynolds,David B. Tanner,Arthur F. Hebard,Andrew G. Rinzler +10 more
TL;DR: Characteristics of the fabrication of ultrathin, transparent, optically homogeneous, electrically conducting films of pure single-walled carbon nanotubes indicate broad applicability of the films for electrical coupling in photonic devices.
Journal ArticleDOI
Direct measurement of antiferromagnetic domain fluctuations
Oleg Shpyrko,E. D. Isaacs,Jonathan Logan,Yejun Feng,Gabriel Aeppli,Rafael Jaramillo,Hyun-Chul Kim,Thomas Rosenbaum,Paul Zschack,Michael Sprung,Suresh Narayanan,Alec Sandy +11 more
TL;DR: This work reveals a fundamental finding about spin dynamics in the simplest antiferromagnet: although the domain wall motion is thermally activated at temperatures above 100 K, it is not so at lower temperatures, and indeed has a rate that saturates at a finite value—consistent with quantum fluctuations—on cooling below 40’K.
Journal ArticleDOI
Antiferromagnetic domain wall engineering in chromium films
Jonathan Logan,Hyun-Chul Kim,Daniel Rosenmann,Zhonghou Cai,Ralu Divan,Oleg Shpyrko,E. D. Isaacs +6 more
TL;DR: In this paper, an antiferromagnetic domain wall was constructed by removing a thin iron cap layer from a chromium film to form a patterned ferromagnetic mask over the Cr film.
Journal ArticleDOI
Hard X-ray polarizer to enable simultaneous three-dimensional nanoscale imaging of magnetic structure and lattice strain.
Jonathan Logan,Ross Harder,Luxi Li,Daniel Haskel,Pice Chen,Robert Winarski,Peter Fuesz,Deborah L. Schlagel,David Vine,C. Benson,Ian McNulty +10 more
TL;DR: The performance of a diamond X-ray phase retarder to enable the production of circularly polarized X-rays has been quantitatively measured and magnetic dichroism contrast in transmission and diffraction geometries has been demonstrated.
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Tungsten-encapsulated gadolinium nanoislands with enhanced magnetocaloric response
TL;DR: In this article, a method for growing chemically pure, oxide-free, air-stable Gd nanoislands with enhanced magnetic properties is described, which are grown by solid state dewetting and are fully encapsulated in tungsten such that they remain stable in ambient environments.