193 citations · 1.2k across the 29 of their papers we have counts for
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Field-Induced Local Excitations Causing Zero-Magnetization Plateaus in Antiferromagnets of Antiferromagnetic Spin Dimers Under Magnetic Field
Myung-Hwan Whangbo, Hyun-Joo Koo, Nikita V. Astakhov +2
Certain antiferromagnets composed of antiferromagnetic spin dimers exhibit a zero-magnetization plateau despite that the single-ion anisotropy of their magnetic ions is negligible.…
Reduction of Ordered Spin Moments in Antiferromagnets of S = 5/2 Ions (Fe3+, Mn2+) Driven by Local Magnetic Excitation
Myung-Hwan Whangbo, Reinhard K. Kremer, Hyun-Joo Koo
For antiferromagnets composed of spin five-half ions, the moments of these ions in the ordered antiferromagnetic state can be significantly smaller than 5 BM (i.e., 1.56 - 4.48 BM)…
Le Chatelier principle and field-induced change in magnetic entropy leading to spin lattice partitioning and magnetization plateau
Myung-Hwan Whangbo, Hyun-Joo Koo, Olga S. Volkova
For a certain antiferromagnet, the magnetization does not increase gradually with increasing magnetic field but exhibits field region(s) typically at an integer fraction of its sat…
High-spin orbital interactions across van der Waals gaps controlling the interlayer ferromagnetism in van der Waals ferromagnets
Hyun-Joo Koo, Reinhard K. Kremer, Myung-Hwan Whangbo
We examined what interactions control the sign and strength of the interlayer coupling in van der Waals ferromagnets such as Fe3-xGeTe2, Cr2Ge2Te6, CrI3 and VI3, to find that high-…
Absence of Spin Frustration in the Kagomé Layers of Cu2+ Ions in Volborthite Cu3V2O7(OH)2x2H2O and Observation of the Suppression and Re-entrance of Specific Heat Anomalies in Volborthite Under External Magnetic Field
Myung-Hwan Whangboa, Hyun-Joo Koo, Eva Brücher +2
We determined the spin exchanges between the Cu2+ ions in the kagome layers of volborthite, Cu3V2O7(OH)2x2H2O, by performing the energy-mapping analysis based on DFT+U calculations…
Spin density wave as a superposition of two magnetic states of opposite chirality and its implications
Elijah E. Gordona, Shahab Derakhshanb, Corey M. Thompsonc +1
A magnetic solid with weak spin frustration tends to adopt a noncollinear magnetic structure such as cycloidal structure below a certain temperature and a spin density wave (SDW) s…