Undergraduate

Publications with data obtained in BSc and MSc projects (list of student's theses see below):

2019

The Complex Electronic Phase Diagram of Single-Crystalline R2PdSi3 (R = Ho, Dy) Studied by Thermal Expansion and Magnetostriction
Liran Wang, Binh Tran (MSc), Mingquan He, Christoph Meingast, Mahmoud Abdel-Hafiez, Chongde Cao, Holger Bitterlich, Wolfgang Löser, Rüdiger Klingeler, J. Phys. Soc. Jpn. 88, 094709 (2019)

Hydrothermal microwave-assisted synthesis of Li3VO4 as an anode for lithium-ion battery
G.S. Zakharova, E. Thauer, S.A. Wegener (BSc), J.-H. Nölke (BSc), Q. Zhu, R. Klingeler, J of Solid State Electrochemistry 23, 2205-2212 (2019), Paper, 2019

High-magnetic field phase diagram and failure of magnetic Grüneisen scaling in LiFePO4
J. Werner, S. Sauerland, C. Koo, C. Neef, A. Pollithy (BSc), Y. Skourski, R. Klingeler, Phys. Rev. B, 214432 (2019), Paper, 2019

The decisive role of magnetic anisotropy in honeycomb layered Li3Ni2SbO6 and Na3Ni2SbO6
J. Werner, W. Hergett (MSc), J.Park, C.Koo, E.A.Zvereva, A.N.Vasiliev, R.Klingeler, J. Magn. Magn. Mat. 481, 100 (2019), Paper, 2019

High-frequency EPR study on Cu4Cu- and Co4Co-metallacrown complexes,
C. Koo, J. Park, J. Butscher (BSc), E. Rentschler, R. Klingeler, J. Magn. Magn. Mat. 477, 340 (2019), Paper, 2019

W. Hergett, M. Jonak (MSc), J. Werner, F. Billert (MSc), S. Sauerland, C. Koo, C. Neef, R. Klingeler, Synthesis and magnetism of a Li2FeSiO4 single crystal, J. Magn. Magn. Mat. 477, 1-3 (2019)

2018

Galina S. Zakharova, Christina Schmidt (MSc), Alexander Ottmann*, Ewa Mijowska, Rüdiger Klingeler, Microwave-assisted hydrothermal synthesis and electrochemical studies of α- and h-MoO3, Journal of Solid State Electrochemistry 22, 3651–3661 (2018)

G. S. Zakharova, A. Ottmann*, L. Möller (BSc), E. I. Andreikov, Z. A. Fattakhova, I. S. Puzyrev, Q. Zhu, E. Thauer, R. Klingeler, TiO2/C nanocomposites prepared by thermal annealing of titanium glycerolate as anode materials for lithium-ion batteries, J Mater Sci 53, 12244-12253 (2018)

C. Koo, J. Werner, M. Tzschoppe (BSc), 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*, Magnetism and the phase diagram of MnSb2O6, Phys. Rev. B 97, 224416 (2018)

K.Wenelska*, A. Ottmann*, D. Moszy?ski, P. Schneider (BSc), R. Klingeler, E. Mijowska, Facile synthesis N-doped hollow carbon spheres from spherical solid silica, Journal of Colloid and Interface Science 511, 203-208 (2018)

L. Wang, J. Werner, A. Ottmann, R. Weis (BSc), M. Abdel-Hafiez, J. Sannigrahi, S. Majumdar, Ch. Koo, R. Klingeler*, Magnetoelastic coupling and ferromagnetic-type in-gap spin excitations in multiferroic α-Cu2V2O7, New J. Phys. 20, 063045 (2018)

2017

V.B. Nalbandyan*, E.A. Zvereva, I.L. Shukaev, E. Gordon, V.V. Politaev, M.-H. Whangbo, A.A. Petrenko, R.S. Denisov, M.M. Markina, M. Tzschoppe (BSC thesis 2016), R. Klingeler, A.N. Vasiliev, A2MnXO4 Family (A = Li, Na, Ag; X = Si, Ge): Structural and Magnetic Properties, Inorg. Chem. 56, 14023–14039 (2017)

A. Ottmann*, M. Scholz, M. Haft, E. Thauer (MSc thesis 2017), P. Schneider (BSc thesis 2015), M. Gellesch, C. Nowka, S. Wurmehl, S. Hampel, R. Klingeler*, Electrochemical Magnetization Switching and Energy Storage in Manganese Oxide filled Carbon Nanotubes, Scientific Reports 7, 13625 (2017), DOI:10.1038/s41598-017-14014-7

J. Werner, W. Hergett, M. Gertig (BSc thesis 2016), J. Park, C. Koo, R. Klingeler*, Anisotropy governed competition of magnetic phases in the honeycomb quantum magnet Na3Ni2SbO6 studied by dilatometry and high-frequency ESR, Phys. Rev. B 95, 214414 (2017)

G.S. Zakharova, A. Ottmann*, B. Ehrstein (BSc thesis 2015), A.P. Tyutyunnik, Q. Zhu, S. Lu, V.I. Voronin, A.N. Enyashin, R. Klingeler, A new polymorph of NH4V3O7: synthesis, structure, magnetic and electrochemical properties, Solid State Sciences 61, 225–231 (2016)

2016

A new polymorph of NH4V3O7: synthesis, structure, magnetic and electrochemical properties
G.S. Zakharova, A. Ottmann*, B. Ehrstein (BSc thesis 2015), A.P. Tyutyunnik, Q. Zhu, S. Lu, V.I. Voronin, A.N. Enyashin, R. Klingeler, Solid State Sciences 61, 225–231 (2016), Paper, 2016

A facile synthesis method and electrochemical studies of hierarchical structured MoS2/C-nanocomposite
Zhenyou Li, Alexander Ottmann, Elisa Thauer (MSc thesis 2017), Christoph Neef, Huazheng Sai, Qing Sun, Krzysztof Cendrowski, Hans-Peter Meyer, Yana Vaynzof, Ewa Mijowska, Junhui Xiang, and Rüdiger Klingeler, RSC Adv. 6, 76084-76092 (2016), Paper, 2016

Magnetic anisotropy and the phase diagram of chiral MnSb2O6
J. Werner (MSc thesis 2016), C. Koo, R. Klingeler*, A. N. Vasiliev, Y. A. Ovchenkov, A. S. Polovkova, G. V. Raganyan, and E. A. Zvereva, Phys. Rev. B 94, 104408 (2016), Paper, 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 (BSc thesis 2014), M.I. Stratan, A.N. Vasiliev, V.B. Nalbandyan, R. Klingeler, J. Phys. Soc. Jpn. 85, 084702 (2016), Paper, 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 (MSc thesis 2016), C. Koo, R. Klingeler, A. A. Tsirlin, Phys. Rev. B 93, 134401, Paper, 2016

Microwave-assisted hydrothermal synthesis of NH4V3O8 microcrystals with controllable morphology
G.S. Zakharova, A. Ottmann, B. Ehrstein (BSc thesis 2015), R. Klingeler, Mat. Res. Bull. 83, 225-229 (2016), Paper, 2016

Hollow carbon sphere/metal oxide nanocomposites anodes for lithium-ion batteries
K. Wenelska, A. Ottmann, P. Schneider (BSC thesis 2015), E. Thauer (MSc thesis 2016), R. Klingeler, E. Mijowska, Energy 103, 100-106 (2016), Paper, 2016

2015

A. Ottmann, G.S. Zakharova, B. Ehrstein (BSc thesis 2015), R. Klingeler. Electrochemical performance of single crystal belt-like NH4V3O8 as cathode material for lithium-ion batteries. Electrochimica Acta 174, 682-687 (2015)

Carbon nanotubes decorated by mesoporous cobalt oxide as electrode material for lithium-ion batteries
K. Wenelska, C. Neef, L. Schlestein (B.Sc. thesis 2015), R. Klingeler, R.J. Kalenczuk, E. Mijowska, Chemical Physics Letters 635, 185–189 (2015), Paper, 2015

Structural, magnetic, and electrochemical properties of LiMn1-xNixPO4
A. Ottmann (M.Sc. thesis), C. Jähne, H.-P. Meyer, R. Klingeler, Materials Research Bulletin 63, 6–12 (2015), Paper, 2015

2014

Unusual spin fluctuations and magnetic frustration in olivine and non-olivine LiCoPO4 detected by 31P and 7Li nuclear magnetic resonance
S.H. Baek, R. Klingeler, C. Neef (M.Sc. thesis), C. Koo, B. Büchner, H.J. Grafe, Phys. Rev. B 89, 134424 (2014), Paper, 2014

Specific Heat of K0.71Na0.29Fe2As2 at Very Low Temperature. A. Reifenberger, M. Hempel, P. Vogt (M.Sc. U HD 2013), S. Aswartham, M. Abdel-Hafiez, V. Grinenko, S. Wurmehl, S.-L. Drechsler, A. Fleischmann, C. Enss, R. Klingeler, J Low Temp Phys 175, 755–763 (2014)

Growth, characterization, and magnetic properties of a Li(Mn,Ni)PO4 single crystal, K. Wang, A. Maljuk, C. Blum, T. Kolb (MSc 2013), C. Jähne, H.-J. Grafe, L. Giebeler, H.-P. Meyer, S. Wurmehl, R. Klingeler, Journal of Crystal Growth 386, 16-21 (2014)

2013

Evidence of d-wave superconductivity in K1−xNaxFe2As2 (x=0,0.1) single crystals from low-temperature specific-heat measurements
M. Abdel-Hafiez, .., P. Vogt (M.Sc. U HD 2013), A. Reifenberger, C. Enss, M. Hempel, R. Klingeler,S.L. Drechsler, Phys. Rev. B 87, 180507(R) (2013)

Morphology controlled NH4V3O8 microcrystals by hydrothermal synthesis.
Galina Z. Zakharova, Ch.Täschner, T. Kolb (diploma U Heidelberg 2013), C. Jähne, A. Leonhardt, B. Büchner, R. Klingeler, Dalton Transactions, 2013

A new LiCoPO4 polymorph via low temperature synthesis
Carsten Jähne, Christoph Neef (diploma U Heidelberg 2012), Changhyun Koo, Hans-Peter Meyer, Rüdiger Klingeler, Journal of Materials Chemistry A, 1(8), 2856-2862, Paper, 2013

A new layered triangular antiferromagnet Li4FeSbO6: spin order, field-induced transitions and anomalous critical behavior
E.A. Zvereva, O.A. Savelieva, Ya.D. Titov, M.A. Evstigneeva, V.B. Nalbandyan, C.N. Kao, J.-Y. Lin, I.A. Presniakov, A.V. Sobolev, S.A. Ibragimov, M. Abdel-Hafiez, Y. Krupskaya, C. Jähne, G. Tan (B.Sc. U de Manila), R. Klingeler, B. Büchner, A.N. Vasiliev, Dalton Trans. 42, 1550-1566 (2013)

Morphology and agglomeration control of LiMnPO4 micro- and nanocrystals
C. Neef (Diplom Physik U Heidelberg 2012), C. Jähne, H.-P. Meyer, R. Klingeler, Langmuir 29, 8054–8060 (2013)

2012

Superparamagnetic FeCo and FeNi Nanocomposites Dispersed in Submicron-Sized C Spheres
E. Ibrahim, S. Hampel, A.U.B. Wolter, M. Kath (BSc U Heidelberg 2011), A. El-Gendy, R. Klingeler, C. Täschner, V. Khavrus, T. Gemming, A. Leonhardt, B. Büchner, J. Phys. Chem. C 116, 22509–22517 (2012)

X. Chen, R. Klingeler,

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