34 citations · 88 across the 12 of their papers we have counts for
8 papers · 1 filter
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…
Single-domain ferromagnet of noncentrosymmetric uniaxial magnetic ions and magnetoelectric interaction
Hyun-Joo Koo, Elijah E. Gordon, Myung-Hwan Whangbo
The feasibility of a single-domain ferromagnet based on uniaxial magnetic ions was examined. For a noncentrosymmetric uniaxial magnetic ion of magnetic moment at a site of local el…
Prediction of spin orientations in terms of HOMO-LUMO interactions using spin-orbit coupling as perturbation
Myung-Hwan Whangbo, Elijah E. Gordon, Hongjun Xiang +2
The preferred spin orientation of a magnetic ion can be predicted on the basis of density functional theory (DFT) calculations including electron correlation and spin-orbit couplin…