Hyun-Joo Joo Koo

Characterization of the Spin-Frustration in Doubly Ordered Perovskite NaYbZnWO₆ Obtained by High-Pressure Synthesis

Kumar, R., Bhat, S., Koo, H.-J., Nam, K., Kim, S.-H., Kim, K. H., … Sundaresan, A. (2025, February 14). Inorganic Chemistry.

Le Chatelier’s Principle and Field-Induced Change in Magnetic Entropy Leading to Spin–Lattice Partitioning and Magnetization Plateau

Whangbo, M.-H., Koo, H.-J., & Volkova, O. S. (2025, September 22). The Journal of Physical Chemistry C.

Magnetization Plateaus by the Field-Induced Partitioning of Spin Lattices

Whangbo, M.-H., Koo, H.-J., Kremer, R. K., & Vasiliev, A. N. (2024, November 4). Condensed Matter.

Polar Layered Magnet Ba₂Cu₃(SeO₃)₄F₂ Composed of Bitriangular Chains: Observation of 1/3-Magnetization Plateau

Yalikun, A., Wang, Y., Shi, N., Chen, Y., Huang, H., Koo, H.-J., … Lu, H. (2024, August 12). Chemistry of Materials.

A cascade of magnetic phase transitions and a 1/3-magnetization plateau in selenite–selenate Co₃(SeO₃)(SeO₄)(OH)₂ with kagomé-like Co²⁺ ion layer arrangements: the importance of identifying a correct spin lattice

Murtazoev, A. F., Berdonosov, P. S., Lyssenko, K. A., Dolgikh, V. A., Geidorf, M. Y., Volkova, O. S., … Vasiliev, A. N. (2023, January 1). Dalton Transactions.

K₂Mn₃O(OH)(VO₄)(V₂O₇) with Sawtooth Chains of Multivalent Manganese Triangular Trimer Units: Magnetic Susceptibility Shrouding a Long-Range Antiferromagnetic Order of Ferromagnetic Triangles

Yakubovich, O. V., Shvanskaya, L. V., Kiriukhina, G. V., Simonov, S. V., Volkov, A. S., Dimitrova, O. V., … Vasiliev, A. N. (2023, August 18). Inorganic Chemistry.

Successive short- and long-range magnetic ordering in rosiaite-type CoGeTeO₆ prepared by ion-exchange reaction

Bazhan, R. V., Nalbandyan, V. B., Vasilchikova, T. M., Koo, H.-J., Whangbo, M.-H., & Vasiliev, A. N. (2023, January 1). Dalton Transactions.

Absence of Spin Frustration in the Kagomé Layers of Cu2+ Ions in Volborthite Cu3V2O7(OH)2·2H2O and Observation of the Suppression and Re-Entrance of Specific Heat Anomalies in Volborthite under an External Magnetic Field

Whangbo, M.-H., Koo, H.-J., Brücher, E., Puphal, P., & Kremer, R. K. (2022, February 28). Condensed Matter.

Spin Exchanges between Transition Metal Ions Governed by the Ligand p-Orbitals in Their Magnetic Orbitals

Whangbo, M.-H., Koo, H.-J., & Kremer, R. K. (2021, January 20). Molecules.

On Ferro- and Antiferro-Spin-Density Waves Describing the Incommensurate Magnetic Structure of NaYNiWO₆

Koo, H.-J., Ravi, S. P. N., Orlandi, F., Sundaresan, A., & Whangbo, M.-H. (2020, December 7). Inorganic Chemistry.

Orbital Magnetic Moments of the High-Spin Co²⁺ Ions at Axially-Elongated Octahedral Sites: Unquenched as Reported from Experiment or Quenched as Predicted by Theory?

Koo, H.-J., Kremer, R. K., & Whangbo, M.-H. (2020, December 8). Inorganic Chemistry.

Peculiarities of magnetic ordering in the S=5/2 two-dimensional square-lattice antimonate NaMnSbO4

Vasilchikova, T., Nalbandyan, V., Shukaev, I., Koo, H.-J., Whangbo, M.-H., Lozitskiy, A., … Zvereva, E. (2020, February 25). Physical Review. B./Physical Review. B.

Synthesis of the Elusive S = ¹/₂ Star Structure: A Possible Quantum Spin Liquid Candidate

Sorolla, M., Wang, X., Koo, H.-J., Whangbo, M.-H., & Jacobson, A. J. (2020, March 6). Journal of the American Chemical Society.

Effect of Nonmagnetic Ion Deficiency on Magnetic Structure: Density Functional Study of Sr₂MnO₂Cu_2–xTe₂, Sr₂MO₂Cu₂Te₂ (M = Co, Mn), and the Oxide-Hydrides Sr₂VO₃H, Sr₃V₂O₅H₂, and SrVO₂H

Koo, H.-J., & Whangbo, M.-H. (2019, October 24). Inorganic Chemistry.

Electronic and Structural Factors Controlling the Spin Orientations of Magnetic Ions

Inorganic Chemistry, 58(18), 11854–11874.

Synthesis and Characterization of Sodium–Iron Antimonate Na₂FeSbO₅: One-Dimensional Antiferromagnetic Chain Compound with a Spin-Glass Ground State

Uma, S., Vasilchikova, T., Sobolev, A., Raganyan, G., Sethi, A., Koo, H.-J., … Zvereva, E. (2019, August 14). Inorganic Chemistry.

The Conceptual Dilemma of the One-Electron Picture in Describing the Uniaxial Magnetism at Linear Coordination Sites

European Journal of Inorganic Chemistry, 2019(21), 2630–2634.

Half-Metallic Ferromagnetism and Large Negative Magnetoresistance in the New Lacunar Spinel GaTi₃VS₈

Dorolti, E., Cario, L., Corraze, B., Janod, E., Vaju, C., Koo, H.-J., … Whangbo, M.-H. (2010, March 31). Journal of the American Chemical Society.

Analysis of the Spin Lattice Model for the Spin-Gapped Layered Compounds Na₃Cu₂SbO₆ and Na₂Cu₂TeO₆ on the Basis of Electronic Structure Calculations

Koo, H.-J., & Whangbo, M.-H. (2007, December 11). Inorganic Chemistry.

On the Relevance of an Antiferromagnetic Dimer Model for the Spin-Gapped Magnetic Solids Cu(terpy)Mo₂O₇ and Cu(OH)(p-pyc)H₂O

Koo, H.-J., Lee, C., Wilson-Short, G. B., Dai, D., & Whangbo, M.-H. (2007, March 10). Inorganic Chemistry.

Spin dimer analysis of the magnetic structures of A2V3O9 (A=Ba, Sr) and η-Na9V14O35: Importance of the V4+–O⋯O–V4+ super-superexchange interactions mediated by the O–V5+–O bridges

Koo, H.-J., & Whangbo, M.-H. (2007, July 11). Solid State Sciences.

Spin Dimer Analysis of the Magnetic Structures of Ba₃Cr₂O₈, Ba₃Mn₂O₈, Na₄FeO₄, and Ba₂CoO₄ with a Three-Dimensional Network of Isolated MO₄ (M = Cr, Mn, Fe, Co) Tetrahedra

Koo, H.-J., Lee, K.-S., & Whangbo, M.-H. (2006, December 1). Inorganic Chemistry.

Dramatic Variation of Magnetic Exchange through Double End-on Azide Bridges in a Series of Ladder-Like Copper(II) Coordination Polymers

Woodward, J. D., Backov, R. V., Abboud, K. A., Dai, D., Koo, H.-J., Whangbo, M.-H., … Talham, D. R. (2005, January 13). Inorganic Chemistry.

Experimental and theoretical investigation on the relative stability of the PdS2- and pyrite-type structures of PdSe2

Investigation of the Incommensurate and Commensurate Magnetic Superstructures of LiCuVO₄ and CuO on the Basis of the Isotropic Spin Exchange and Classical Spin Approximations

Dai, D., Koo, H.-J., & Whangbo, M.-H. (2004, May 28). Inorganic Chemistry.

Reexamination of the Magnetic Properties of Cu₂(dca)₄(2,5-me₂pyz) {dca = Dicyanamide; me₂pyz = Dimethylpyrazine}:  Isolated Spin-¹/₂ Dimers versus Long-Range Magnetic Ordering

Manson, J. L., Schlueter, J. A., Koo, H.-J., & Whangbo, M.-H. (2004, June 2). Inorganic Chemistry.

Synthesis and characterization of a magnetic semiconductor Na2RuO4 containing one-dimensional chains of RU6+

Inorganic Chemistry, 43(1), 07-.

Cu(HCO₂)₂L {L = pyrazine, 4,4′-bipyridine}: employing the formate anion as a building block in three-dimensional coordination polymers

Manson, J. L., Lecher, J. G., Gu, J., Geiser, U., Schlueter, J. A., Henning, R., … Whangbo, M.-H. (2003, January 1). Dalton Transactions.

Interpretation of the magnetic structures of Cu2Te2O5X2 (X = Cl, Br) and Ca3.1Cu0.9RuO6 on the basis of electronic structure considerations: Cases for strong super-superexchange interactions involving Cu2+ ions

Investigation of the Spin Exchange Interactions and Magnetic Structures of the CrVO₄-Type Transition Metal Phosphates, Sulfates, and Vanadates by Spin Dimer Analysis

Koo, H.-J., Whangbo, M.-H., & Lee, K.-S. (2003, August 21). Inorganic Chemistry.

Investigations of the oxidation states and spin distributions in Ca3Co2O6 and Ca3CoRhO6 by spin-polarized electronic band structure calculations

Whangbo, M.-H., Dai, D., Koo, H.-J., & Jobic, S. (2003, January 30). Solid State Communications.

Magnetic Superstructures of Cupric Oxide CuO as Ordered Arrangements of One-Dimensional Antiferromagnetic Chains

Koo, H.-J., & Whangbo, M.-H. (2003, January 23). Inorganic Chemistry.

Spin exchange interactions and magnetic structures of extended magnetic solids with localized spins: theoretical descriptions on formal, quantitative and qualitative levels

Whangbo, M.-H., Koo, H.-J., & Dai, D. (2003, September 3). Journal of Solid State Chemistry.

Syntheses, Structures, and Optical Properties of Yellow Ce₂SiS₅, Ce₆Si₄S₁₇, and Ce₄Si₃S₁₂ Materials

Gauthier, G., Jobic, S., Evain, M., Koo, H.-J., Whangbo, M.-H., Fouassier, C., & Brec, R. (2003, January 22). Chemistry of Materials.

Synthesis of the highly 1D conductor (THTTF)4I19

Montgomery, L. K., Starkey, K. P., Engel, D. B., Bollinger, J., Tittelbach, M., Schweitzer, D., … Whangbo, M.-H. (2003, March 1). Synthetic Metals.

Trends in Metal−Biradical Exchange Interaction for First-Row M^II(Nitronyl Nitroxide-Semiquinone) Complexes

Shultz, D. A., Vostrikova, K. E., Bodnar, S. H., Koo, H.-J., Whangbo, M.-H., Kirk, M. L., … Kampf, J. W. (2003, January 18). Journal of the American Chemical Society, Vol. 125, pp. 1607–1617.

Trends in the structure and bonding in the layered platinum dioxide and dichalcogenides PtQ2 (Q=O, S, Se, Te)

Dai, D., Koo, H.-J., Whangbo, M.-H., Soulard, C., Rocquefelte, X., & Jobic, S. (2003, April 24). Journal of Solid State Chemistry.

A two-dimensional radical salt based upon BEDT-TTF and the dimeric, magnetic anion [Fe(tdas)₂]₂²⁻: (BEDT-TTF)₂[Fe(tdas)₂] (tdas = 1,2,5-thiadiazole-3,4-dithiolate)

Deplano, P., Leoni, L., Mercuri, M. L., Schlueter, J. A., Geiser, U., Wang, H. H., … Whangbo, M.-H. (2002, January 1). Journal of Materials Chemistry.

Analysis of the Electron Localization, the Anisotropy of Electrical Conductivity, the Orbital Ordering, and Spin-Exchange Interactions in BaVS3 on the Basis of First Principles and Semi-empirical Electronic Structure Calculations

Whangbo, M.-H., Koo, H.-J., Dai, D., & Villesuzanne, A. (2002, May 1). Journal of Solid State Chemistry.

Dimensionality Effects on the Optical Properties of (PO₂)₄(WO₃)_2m (m = 2, 4, 6, 7)

Zhu, Z.-T., Musfeldt, J. L., Koo, H.-J., Whangbo, M.-H., Teweldemedhin, Z. S., & Greenblatt, M. (2002, May 4). Chemistry of Materials.

Effect of Metal−Ligand Bond Lengths on Superexchange Interactions in Jahn−Teller d⁴ Ion Systems:  Spin Dimer Analysis of the Magnetic Structure of Marokite CaMn₂O₄

Whangbo, M.-H., Koo, H.-J., Dai, D., & Jung, D. (2002, September 21). Inorganic Chemistry.

Effect of Metal−Oxygen Covalent Bonding on the Competition between Jahn−Teller Distortion and Charge Disproportionation in the Perovskites of High-Spin d⁴ Metal Ions LaMnO₃ and CaFeO₃

Whangbo, M.-H., Koo, H.-J., Villesuzanne, A., & Pouchard, M. (2002, March 1). Inorganic Chemistry.

Electrical Resistivity, Magnetic Susceptibility, X-Ray Photoelectron Spectroscopy, and Electronic Band Structure Studies of Cu2.33−xV4O11

Rozier, P., Galy, J., Chelkowska, G., Koo, H.-J., & Whangbo, M.-H. (2002, July 1). Journal of Solid State Chemistry.

Flux Growth of Vanadyl Pyrophosphate, (VO)₂P₂O₇, and Spin Dimer Analysis of the Spin Exchange Interactions of (VO)₂P₂O₇ and Vanadyl Hydrogen Phosphate, VO(HPO₄)·0.5H₂O

Koo, H.-J., Whangbo, M.-H., Vernooy, P. D., Torardi, C. C., & Marshall, W. J. (2002, August 14). Inorganic Chemistry.

Magnetic properties of the low-dimensional cuprate Na5RbCu4(AsO4)(4)Cl-2

Physical Review. B, Condensed Matter and Materials Physics, 66(5), 052403–052401.

Optical Investigation of Na₂V₃O₇ Nanotubes

Choi, J., Musfeldt, J. L., Wang, Y. J., Koo, H.-J., Whangbo, M.-H., Galy, J., & Millet, P. (2002, January 18). Chemistry of Materials.

Orbital interaction analysis of cooperative Jahn–Teller distortion, orbital ordering, spin ordering, and spin exchange interactions in magnetic solids

Whangbo, M.-H., & Koo, H.-J. (2002, March 1). Solid State Sciences.

Spin Dimer Analysis of the Spin Exchange Interactions in Paramelaconite Cu₄O₃ and Its Analogue Ag₂Cu₂O₃ and the Spin Ordering of the Cu₂O₃ Spin Lattice Leading to Their Magnetic Phase Transitions

Whangbo, M.-H., & Koo, H.-J. (2002, June 1). Inorganic Chemistry.

Spin dimer analysis of the three-dimensional antiferromagnetic ordering in the quaternary manganese sulfides BaLn2MnS5 (Ln=La, Ce, Pr)

Koo, H.-J., Whangbo, M.-H., & Lee, K.-S. (2002, December 1). Journal of Solid State Chemistry.

Theoretical Investigation of the Spin Exchange Interactions and Magnetic Properties of the Homometallic Ludwigite Fe₃O₂BO₃

Whangbo, M.-H., Koo, H.-J., Dumas, J., & Continentino, M. A. (2002, March 14). Inorganic Chemistry.

Trifluoromethylsulfonyl-Based Salts of BEDT-TTF: Crystal and Electronic Structures and Physical Properties11

Schlueter, J. A., Geiser, U., Wang, H. H., Kini, A. M., Ward, B. H., Parakka, J. P., … Whangbo, M.-H. (2002, November 1). Journal of Solid State Chemistry.

Influence of the Metal–Metal Sigma Bonding on the Structures and Physical Properties of the Hexagonal Perovskite-Type Sulfides Sr9/8TiS3, Sr8/7TiS3, and Sr8/7[Ti6/7Fe1/7]S3

Gourdon, O., Jeanneau, E., Evain, M., Jobic, S., Brec, R., Koo, H.-J., & Whangbo, M.-H. (2001, November 1). Journal of Solid State Chemistry.