O
Owen Vajk
Researcher at National Institute of Standards and Technology
Publications - 15
Citations - 1227
Owen Vajk is an academic researcher from National Institute of Standards and Technology. The author has contributed to research in topics: Neutron diffraction & Antiferromagnetism. The author has an hindex of 10, co-authored 15 publications receiving 1163 citations.
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Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3
Michel Kenzelmann,Michel Kenzelmann,Michel Kenzelmann,A. B. Harris,Seth Jonas,Collin Broholm,Collin Broholm,J. Schefer,S. B. Kim,Chenglin Zhang,Sang-Wook Cheong,Owen Vajk,Jeffrey W. Lynn +12 more
TL;DR: It is shown that the spiral breaks spatial inversion symmetry and can account for magnetoelectricity in TbMnO3.
Journal ArticleDOI
Spin correlations in the electron-doped high-transition-temperature superconductor Nd2-xCexCuO4+/-delta.
TL;DR: Measurements reveal a magnetic quantum critical point where superconductivity first appears, consistent with an exotic quantum phase transition between the two phases, and demonstrate that the pseudogap phenomenon in the electron-doped materials arises from a build-up of spin correlations, in agreement with recent theoretical proposals.
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Magnetic order and spin dynamics in ferroelectric HoMnO3.
TL;DR: The magnetic structures and phase diagram have been determined, and reveal additional transitions below 8 K where the ferroelectrically displaced Ho3+ ions are ordered magnetically.
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Quantum Impurities in the Two-Dimensional Spin One-Half Heisenberg Antiferromagnet
TL;DR: Complementary neutron scattering and numerical experiments demonstrate that the spin-diluted Heisenberg antiferromagnet La2Cu1–z (Zn,Mg)zO4 is an excellent model material for square-lattice site percolation in the extreme quantum limit of spin one-half.