Journal publications (ESR group)
- An Unprecedented Square Planar Fe(III) Complex Exhibiting Spin Crossover Between the Spin-Admixed States.
K.U. Ansari, D. Borah, L. Spillecke, K. Thangavel, P. Kumar, S. Dey, R. Klingeler, M. Clémancey, A. Rasamsetty, S. Hill, G. Blondin, G. Rajaraman, M. Shanmugam.Chem – Eur J, (2026): e70994 - Towards Understanding Prolate 4f Monomers: Numerical Predictions and Experimental Validation of Electronic Properties and Slow Relaxation in a Muffin-shaped ErIII Complex
J. Arneth, C. Pachl, G. Greif, B. Beier, P. W. Roesky, K. Fink, R. KlingelerInorg. Chem. (2026) - Elucidating the origin of long-range ferromagnetic order in Fe3GeTe2 by low-energy magnon excitation studies
B. G. Beier and E. S. Beier and J. Arneth and Brücher, E. and R. K. Kremer and R. KlingelerPhys. Rev. B 112 (2025) 214414 - Spin waves in Na2Co2TeO6 studied by high-frequency/high-field ESR: Successes and failures of the triple-q model.
Luca Bischof, Jan Arneth, Raju Kalaivanan, Raman Sankar, Kwang-Yong Choi, Rüdiger KlingelerPhys. Rev. B 112, 104406 (2025) - The relevance of non-axiality and low-lying excited states for slow magnetic relaxation in pentagonal-bipyramidal Erbium(III) complexes probed by high-frequency EPR
J. Arneth, L. Spillecke, C. Koo, T.A. Bazhenova, E.B. Yagubskii, R. KlingelerChemistry - A European Journal 31, e202500369 (2025) - The Interplay of Single Ion Anisotropy and Magnetic 3d-4f Interactions in VIII2LnIII2 Butterfly Complexes
J. Arneth, X.-F. Li, J. Braun, S. Paul, M. Schulze, C.E. Anson, W. Wernsdorfer, A.K. Powell, R. KlingelerChemistryEurope 2025, e202500011 - Two-stage evolution of magnetic correlations in the spiral spin liquid material Ca10Cr7O28
Changhyun Koo, Jaena Park, Johannes Werner, Suheon Lee, Christian Balz, A. T. M. Nazmul Islam, Yugo Oshima, Bella Lake, Kwang-Yong Choi, Rüdiger KlingelerPhys. Rev. B 111, 125144 (2025) - Low-energy magnon excitations and emerging anisotropic nature of short-range order in CrI3
M. Jonak, E. Walendy, J. Arneth, M. Abdel-Hafiez, and R. KlingelerPhys. Rev. B 106, 214412 (2022) - Role of magnetoelastic coupling and magnetic anisotropy in MnTiO3
L. Gries, M. Jonak, A. Elghandour, K. Dey, R. KlingelerPhys. Rev. B 106, 174425 - Probing the Origin of Ferro-/Antiferromagnetic Exchange Interactions in Cu(II)–4f Complexes
N. Ahmed, T. Sharma, L. Spillecke, C. Koo, K.U. Ansari, S. Tripathi, A. Caneschi, R. Klingeler, G. Rajaraman, M. ShanmugamInorg. Chem. 61, 5572–5587 (2022) - Role of Coordination Geometry on the Magnetic Relaxation Dynamics of Isomeric Five-Coordinate Low-Spin Co(II) Complexes
L. Spillecke, S. Tripathi, C. Koo, A. Bahr, A. Swain, R. Halder, M. Ansari, J. Jasinski, G. Rajaraman, M. Shanmugam, R. KlingelerInorg. Chem 61, 317–327 (2022) - Magnetic behavior of the novel pentagonal-bipyramidal Erbium(III) complex (Et3NH)[Er(H2DAPS)Cl2]: high-frequency EPR study and crystal-field analysis
L. Spillecke, C. Koo, O. Maximova, V.S. Mironov, V.A. Kopotkov, D.V. Korchagin, A. Vasiliev, E.B. Yagubskii, R. KlingelerDalton Transactions 50, 18143-18154 (2021) - A high-frequency EPR study of magnetic anisotropy and intermolecular interactions on Co(II) ions
Lena Spillecke, Shalini Tripathi, Changhyun Koo, Mursaleem Ansari, Shefali Vaidya, Amaleswari Rasamsetty, Talal Mallah, Gopalan Rajaraman, Maheswaran Shanmugam, Rüdiger KlingelerPolyhedron 208, 115389 (2021) - Validation of Ab-Initio-Predicted Magnetic Anisotropies and Magneto-structural Correlations in Linear Heterotrinuclear DyIII-NiII2 Compounds
P. Comba, M. Enders, M. Großhauser, M. Hiller, R. Klingeler, C. Koo, D. Müller, G. Rajaraman, A. Swain, M. Tavhelidse, H. WadepohlChem. Eur. J. 27, 9372–9382 (2021) - Exceptional field dependence of antiferromagnetic magnons in LiFePO4
J. Werner, C. Neef, C. Koo, A. Ponomaryov, S. Zvyagin, R. KlingelerPhys. Rev. B 103, 174406 (2021) - Structure-property correlationin stabilizing axial magnetic anisotropyin octahedral Co(II) complexes
S. Tripathi, S. Vaidya, N. Ahmed, E. Andreasen Klahn, H. Cao, L. Spillecke, Ch. Koo, S. Spachmann, R. Klingeler*, G. Rajaraman*, J. Overgaard*, M. Shanmugam*Cell Reports Physical 2, 100404 (2021) - Antisite disorder in the battery material LiFePO4
J. Werner, C. Neef, C. Koo, S. Zvyagin, A. Ponomaryov, and R. KlingelerPhys. Rev. Materials 4, 115403 (2020) - The first pentagonal-bipyramidal vanadium(III) complexes with a Schiff-base N3O2 pentadentate ligand: synthesis, structure and magnetic properties,
Tamara A. Bazhenova, Leokadiya V. Zorina, Sergey V. Simonov, Vladimir S. Mironov, Olga V. Maximova, Lena Spillecke, Changhyun Koo, Rüdiger Klingeler, Yuriy V. Manakin, Alexander N. Vasiliev , Eduard B. YagubskiiDalton Transactions 49, 15287 (2020) - Thermodynamic and resonant properties of mixed spin systems ACuFe2(VO4)3 (A = Li, Na)
A. Koshelev, K. Zakharov, O. Volkova, L. Shvanskaya, F. Theuss, C. Koo, R. Klingeler, S. Kundu, S. Bachhar, A.V. Mahajan, P. Khuntia, S. Kamusella, H.-H. Klauss, D. Khanam, B. Rahaman, T. Saha-Dasgupta, A. VasilievJournal of Alloys and Compounds 842, 155763 (2020) - Influence of Counter-Anion on the Zero Field Splitting of Tetrahedral Co(II) Thiourea Complexes
S. Tripathi, S. Vaidya, K.U. Ansari, N. Ahmed, E. Riviere, L. Spillecke, C. Koo, R. Klingeler, T. Mallah, G. Rajaraman, M. ShanmugamInorg. Chem. 58, 9085-9100 (2019) - The decisive role of magnetic anisotropy in honeycomb layered Li3Ni2SbO6 and Na3Ni2SbO6
J. Werner, W. Hergett, J.Park, C.Koo, E.A.Zvereva, A.N.Vasiliev, R.KlingelerJ. Magn. Magn. Mat. 481, 100 (2019) - High-frequency EPR study on Cu4Cu- and Co4Co-metallacrown complexes,
C. Koo, J. Park, J. Butscher, E. Rentschler, R. KlingelerJ. Magn. Magn. Mat. 477, 340 (2019) - Magnetoelastic coupling and ferromagnetic-type in-gap spin excitations in multiferroic α-Cu2V2O7
L. Wang, J. Werner, A. Ottmann, R. Weis, M. Abdel-Hafiez, J. Sannigrahi, S. Majumdar, Ch. Koo, R. Klingeler*New J. Phys. 20, 063045 (2018) - Magnetism and the phase diagram of MnSb2O6
C. Koo, J. Werner, M. Tzschoppe, M. Abdel-Hafiez, P. K. Biswas, R. Sarkar, H.-H. Klauss, G. V. Raganyan, E. A. Ovchenkov, A. Yu. Nikulin, A. N. Vasiliev, E. A. Zvereva, and R. Klingeler*Phys. Rev. B 97, 224416 (2018) - Electronic structure and magnetic properties of the strong-rung spin-1 ladder compound Rb3Ni2(NO3)7
Z. V. Pchelkina, V. V. Mazurenko, O. S. Volkova, E. B. Deeva, I. V. Morozov, V. V. Shutov, S. I. Troyanov, J. Werner, C. Koo, R. Klingeler, A. N. VasilievPhys. Rev. B 97, 144420 (2018) - Correlation of structural and magnetic properties in a set of mononuclear lanthanide complexes
P. Comba, L.J. Daumann, R. Klingeler, C. Koo, M.J. Riley, A.E. Roberts, H. Wadepohl, J. WernerChemistry – Eur. J. 24, 5319 –5330 (2018) - Tri- (M = CuII) and hexanuclear (M = NiII, CoII) heterometallic coordination compounds with ferrocene monocarboxylate ligands: Solid-state structures and thermogravimetric, electrochemical and magnetic properties
K. Müller, M. Korb, C. Koo, R. Klingeler, D. Miesel, A. Hildebrandt, T. Rüffer, H. LangPolyhedron 138, 185-193 (2017) - Zigzag spin structure in layered honeycomb Li3Ni2SbO6: A combined diffraction and antiferromagnetic resonance study
A.I. Kurbakov*, A.N. Korshunov, S.Yu. Podchezertsev, A.L. Malyshev, M.A. Evstigneev, F. Damay, J. Park, C. Koo, R. Klingeler*, E.A. Zvereva, V.B. NalbandyanPhys. Rev. B 96, 024417 (2017) - Anisotropy governed competition of magnetic phases in the honeycomb quantum magnet Na3Ni2SbO6 studied by dilatometry and high-frequency ESR
J. Werner, W. Hergett, M. Gertig, J. Park, C. Koo, R. Klingeler*Phys. Rev. B 95, 214414 (2017) - A three-pronged attack to investigate the electronic structure of a family of ferromagnetic Fe4Ln2 cyclic coordination clusters; a combined magnetic susceptibility, HF-EPR and 57Fe Mössbauer study (Cover letter)
S.F.M. Schmidt, C. Koo, V. Mereacre, J. Park, D.W. Heermann, V. Kataev, C.E. Anson, D. Prodius, G. Novitchi, R. Klingeler*, A.K. Powell*Inorg. Chem. 56, 4796–4806 (2017) - Magnetic anisotropy and the phase diagram of chiral MnSb2O6
J. Werner, C. Koo, R. Klingeler*, A. N. Vasiliev, Y. A. Ovchenkov, A. S. Polovkova, G. V. Raganyan, and E. A. ZverevaPhys. Rev. B 94, 104408 (2016) - Static and Dynamic Magnetic Response of Fragmented Haldane-like Spin Chains in Layered Li3Cu2SbO6
C. Koo, E.A. Zvereva, I.L. Shukaev, M. Richter, M.I. Stratan, A.N. Vasiliev, V.B. Nalbandyan, R. Klingeler*J. Phys. Soc. Jpn. 85, 084702 (2016) - 1/3 magnetization plateau and frustrated ferrimagnetism in a sodium iron phosphite
A. N. Vasiliev*, O. S. Volkova, E. A. Zvereva, E. A. Ovchenkov, I. Munaò, L. Clark, P. Lightfoot, E. L. Vavilova, S. Kamusella, H.-H. Klauss, J. Werner, C. Koo, R. Klingeler, A. A. TsirlinPhys. Rev. B 93, 134401 - Magnetic interactions in a series of homodinuclear lanthanide complexes
P. Comba*, M. Großhauser, R. Klingeler, C. Koo, Y. Lan, D. Müller, J. Park, A. Powell, M.J. Riley, H. WadepohlInorg. Chem. 54, 11247-11258 (2015)
Finished theses (ESR group)
- Magnetic and dilatometric studies of the correlated systems TbInO3, Tb2Zr2−xTixO7, Er2Te4O11, and Fe3GaTe2
Frederick Leon CarstensMasterarbeit, 2026 - Electron Paramagnetic Resonance and
Magnetisation Studies on 3d-, 3d-4f- and Bi-based
Metal-Organic Molecular Complexes
Matthias HeinrichMasterarbeit, 2026 - Experimental Studies on the Ligand Field Effects and Magnetic Interactions in 3d, 4f and 5d Mono- and Heterometallic Molecular Compounds
Jan ArnethDissertation, 2025 - Messung der Magnetisierung von Fe(III)2-Komplexen und Diradikalsystemen
Tillmann StorkBachelorarbeit, 2024 - Electron paramagnetic resonance and magnetisation studies on metal-organic complexes, polymers and bioinspired systems
Birte BeierMasterarbeit, 2024 - Electron Spin Resonance and Ab-Initio Multiplet Ligand Field Theory Studies on the Trigonal Trinuclear Complexes NMe4[TM3(μ3-F)(TFA)6(Py)3] (TM = Co, Cu)
Kevin AckermannMasterarbeit, 2023 - Electron Spin Resonance Studies on Frustrated Low Dimensional PbCuSeO4(OH)2 and GdInO3
Rahel OhlendorfMasterarbeit, 2023 - Low-Energy Magnetic Excitations and Magnetisation in Magnetoelectric Antiferromagnets MnTiO3 and LiMnPO4 and in van-der-Waals Ferromagnet CrI3
Martin JonakDissertation, 2022 - Elektronenspinresonanz-Spektroskopie und
Messungen der Magnetisierung mononuklearer
Lanthanoidkomplexe
Johannes HägeleBachelorarbeit, 2022 - Magnetische Untersuchungen an quasi-1D Spinketten in PbCuSeO4(OH)2 und mononuklearen metallorganischen Cr(II) Komplexen
Daniel KnauerBachelorarbeit, 2022 - ESR Spectroscopy on Quasi-One-Dimensional Quantum Spin Systems
Paula FeltesMasterarbeit, 2022 - High-frequency / High- eld Electron Paramagnetic Resonance Investigations on Metal-Organic Molecular Compounds
Lena SpilleckeDissertation, 2022 - Experimentelle Untersuchungen der Magnetisierung und der Elektronenspinresonanz an Übergangsmetallverbindungen mit konkurrierenden Wechselwirkungen
Johannes WernerDissertation, 2020 - Experimentelle Untersuchungen der Magnetisierung und der Elektronenspinresonanz an Übergangsmetallverbindungen mit konkurrierenden Wechselwirkungen
Johannes WernerDissertation, 2019 - High-Frequency Electron Paramagnetic Resonance Studies on Mn2 and Co-complexes
Sajeedeh ShabaziMasterarbeit, 2019 - Mixed-spin chains in ACuFe2(VO4)3 studied by ESR and static magnetisation
Florian TheussMasterarbeit, 2019 - High-Frequency Electron Paramagnetic Resonance and Magnetic Studies on Fe2Ln2 (Ln = Y, Gd, Dy) Complexes
Silvia MenghiMasterarbeit, 2018 - HF-ESR-Spektroskopie und Messungen der statischen Suszeptibilität an Co1- und Co2-metallorganischen Komplexen
Felix SpathelfBachelorarbeit, 2018 - High-Frequency Electron Spin Resonance and Magnetisation Studies on Li2FeSiO4 and Li2CuHfO4
Fabian BillertMasterarbeit, 2017 - Messungen der statischen Suszeptibilität und
hochfrequente Elektronenspinresonanz-Spektroskopie an Cu2- und Fe2-metallorganischen Komplexen
Marco HoffmannBachelorarbeit, 2017 - High-Frequency and X-Band Electron Spin Resonance Investigation of Ni(II) Complexes and Ferritin
Sven SpachmannMasterarbeit, 2017 - Hochfrequenz-Elektronenspinresonanz-Spektroskopie an
heterometallischen 3d- und 4f- Komplexen
Julian ButscherBachelorarbeit, 2017 - Statische und dynamische magnetische Eigenschaften
von metallorganischen Ni2- und
Ni2-Lanthanoid-Verbindungen
Msia TavhelidseMasterarbeit, 2016 - High-frequency EPR studies on metal-organic materials
Gabriel PürMasterarbeit, 2016 - Hochfrequenz-Elektronen-Spin-Resonanz-Spektroskopie an antiferromagnetischen Übergangsmetallverbindungen
Johannes WernerMasterarbeit, 2015 - High-frequency EPR studies on metal-organic systems and transition metal compounds
Jaena ParkDissertation, 2015 - Hochfeld Elektronen-Spin-Resonanz Spektroskopie an
Na3Co2SbO6 und LiMn2TeO6
Sascha JungBachelorarbeit, 2015 - Hochfeld Elektronen-Spin-Resonanz Messungen an
Na3Cu2SbO6 und Li3Cu2SbO6
Michael RichterBachelorarbeit, 2014 - Hochfeld-/Hochfrequenz-ESR-Spektroskopie an einkristallinem Li(Mn,Ni)PO4
Msia TavhelidseBachelorarbeit, 2014
