Towards engineering the perfect defect in high-performing permanent magnets

Authors: Giron, S., Polin, N., Adabifiroozjaei, E., Yang, Y., Kovács, A., Almeida, T. P., Ohmer, D., Üstüner, K., Saxena, A., Katter, M., Radulov, I. A., Freysoldt, C., Dunin-Borkowski, R. E., Farle, M., Durst, K., Zhang, H., Alff, L., Ollefs, K., Xu, B. -X., Gutfleisch, O., Molina-Luna, L., Gault, B., Skokov, K. P.

Subject Terms: Condensed Matter - Materials Science

Access URL: http://arxiv.org/abs/2304.14958

A multi-stage, first-order phase transition in LaFe11.8Si1.2: interplay between the structural, magnetic and electronic degrees of freedom

Authors: Skokov, K. P., Karpenkov, A. Y., Karpenkov, D. Y., Radulov, I. A., Günzing, D., Eggert, B., Rogalev, A., Wilhelm, F., Liu, J., Shao, Y., Ollefs, K., Gruner, M. E., Wende, H., Gutfleisch, O.

Subject Terms: Condensed Matter - Materials Science

Access URL: http://arxiv.org/abs/2303.13836

Simultaneous Multi-Property Probing During Magneto-Structural Phase Transitions: An Element-Specific and Macroscopic Hysteresis Characterization at ID12 of the ESRF

Authors: Aubert, A., Skokov, K., Gomez, G., Chirkova, A., Radulov, I., Wilhelm, F., Rogalev, A., Wende, H., Gutfleisch, O., Ollefs, K.

Source: IEEE Transactions on Instrumentation and Measurement IEEE Trans. Instrum. Meas. Instrumentation and Measurement, IEEE Transactions on. 71:1-9 2022

Effect of high energy ball milling, heat treatment and spark plasma sintering on structure, composition, thermal stability and magnetism in CoCrFeNiGax (x = 0.5; 1) high entropy alloys

Authors: Shkodich, N.F. ^{a, ⁎}, Smoliarova, T. ^a, Ali, H. ^{b, c}, Eggert, B. ^a, Rao, Z. ^d, Spasova, M. ^a, Tarasov, I. ^a, Wende, H. ^a, Ollefs, K. ^a, Gault, B. ^{d, e}, Farle, M. ^a

Source: In Acta Materialia 1 January 2025 284

Effect of lattice excitations on transient near edge X-ray absorption spectroscopy

Authors: Rothenbach, N., Gruner, M. E., Ollefs, K., Schmitz-Antoniak, C., Salamon, S., Zhou, P., Li, R., Mo, M., Park, S., Shen, X., Weathersby, S., Yang, J., Wang, X. J., Šipr, O., Ebert, H., Sokolowski-Tinten, K., Pentcheva, R., Bovensiepen, U., Eschenlohr, A., Wende, H.

Source: Phys. Rev. B 104, 144302 (2021)

Subject Terms: Condensed Matter - Materials Science

Access URL: http://arxiv.org/abs/1911.06201

Extracting the Dynamic Magnetic Contrast in Time-Resolved X-ray Transmission Microscopy

Authors: Schaffers, T., Feggeler, T., Pile, S., Meckenstock, R., Buchner, M., Spoddig, D., Ney, V., Farle, M., Wende, H., Wintz, S., Weigand, M., Ohldag, H., Ollefs, K., Ney, A.

Source: Nanomaterials 9, 940 (2019)

Subject Terms: Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science

Access URL: http://arxiv.org/abs/1905.12497

Microscopic non-equilibrium energy transfer dynamics in a photoexcited metal/insulator heterostructure

Authors: Rothenbach, N., Gruner, M. E., Ollefs, K., Schmitz-Antoniak, C., Salamon, S., Zhou, P., Li, R., Mo, M., Park, S., Shen, X., Weathersby, S., Yang, J., Wang, X. J., Pentcheva, R., Wende, H., Bovensiepen, U., Sokolowski-Tinten, K., Eschenlohr, A.

Source: Phys. Rev. B 100, 174301 (2019)

Subject Terms: Condensed Matter - Materials Science

Access URL: http://arxiv.org/abs/1902.05264

Peculiarities of Disorder-Induced Ferromagnetism Phenomena in Fe60A40 films on a local scale

Authors: Smekhova, A., Torre, E. La, Szyjka, T., Eggert, B., Coster, B., Ollefs, K., Walecki, D., Salamon, S., Bali, R., Lindner, J., Wilhelm, F., Rogalev, A., Weschke, E., Tobbens, D., Banerjee, R., Sanyal, B., Schmitz-Antoniak, C., Wende, H.

Source: 2018 IEEE International Magnetics Conference (INTERMAG) Magnetics Conference (INTERMAG), 2018 IEEE International. :1-1 Apr, 2018

Relation: 2018 IEEE International Magnetics Conference (INTERMAG)

Absence of magnetic proximity effects in magnetoresistive Pt/CoFe2O4 hybrid interfaces

Authors: Valvidares, M., Dix, N., Isasa, M., Ollefs, K., Wilhelm, F., Rogalev, A., Sánchez, F., Pellegrin, E., Bedoya-Pinto, A., Gargiani, P., Hueso, L. E., Casanova, F., Fontcuberta, J.

Source: Physical Review B 93, 214415 (2016)

Subject Terms: Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics

Access URL: http://arxiv.org/abs/1510.01080

Role of kinetic energy on Nb3Sn thin films by low-temperature co-sputtering.

Authors: Schäfer, N.¹, nils.schaefer@tu-darmstadt.de, Günzing, D.², Jiang, T.³, Karabas, N.¹, Arzumanov, A.¹, Motta-Meira, D.⁴, Ollefs, K.², Komissinskiy, P.¹, Major, M.¹, Arnold, M.⁵, Pietralla, N.⁵, Wende, H.², Molina-Luna, L.³, Lützenkirchen-Hecht, D.⁶, Alff, L.¹

Source: Journal of Applied Physics; 7/28/2023, Vol. 134 Issue 4, p1-7, 7p

Spin pumping damping and magnetic proximity effect in Pd and Pt spin-sink layers

Authors: Caminale, M., Ghosh, A., Auffret, S., Ebels, U., Ollefs, K., Wilhelm, F., Rogalev, A., Bailey, W. E.

Source: Phys. Rev. B 94 014414 (2016)

Subject Terms: Condensed Matter - Mesoscale and Nanoscale Physics

Access URL: http://arxiv.org/abs/1308.0450

Local structure and X-ray magnetic circular dichroism of Au in Au-Co nanoalloys

Authors: Maurizio, C., Michieli, N., Kalinic, B., Mattarello, V., Bello, V., Wilhelm, F., Ollefs, K., Mattei, G.

Source: In Applied Surface Science 1 March 2018 433:596-601

Magnetic and XMCD studies of Pr1−xSrxMnO3 manganite films

Authors: Samoshkina, Yu.E., Edelman, I.S., Stepanova, E.A., Neznakhin, D.S., Ollefs, K., Andreev, N.V., Chichkov, V.I.

Source: In Journal of Magnetism and Magnetic Materials 15 April 2017 428:43-49

Co-Doped ZnO Epitaxial Films: From a Brillouin-Like Paramagnet to a Phase-Separated Superparamagnetic Ensemble
International conference from nanoparticles and nanomaterials to nanodevices and nanosystems

Authors: Ney, V., Ye, S., Ollefs, K., Kammermeier, T., Wilhelm, F., Rogalev, A., Ney, A.

Source: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY. 10(9):5958-5963

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCCN077418774&indx=1&recIds=ETOCCN077418774

Observation of the Onset of Magnetic Clustering in Superparamagnetic Zn1−x Co x O Films
Physics and applications of spin-related phenomena in semiconductors

Authors: Ye, S., Ney, V., Kammermeier, T., Ollefs, K., Ney, A., Wilhelm, F., Rogalev, A.

Source: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM. 23(1):91-94

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCCN075541866&indx=1&recIds=ETOCCN075541866

Non-standing spin-waves in confined micrometer-sized ferromagnetic structures under uniform excitation

Authors: Pile, S., Feggeler, T., Schaffers, T., Meckenstock, R., Buchner, M., Spoddig, D., Zingsem, B., Ney, V., Farle, M., Wende, H., Ohldag, H., Ney, A., Ollefs, K.

Source: Applied physics letters. 116(7)

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCvdc_100098852791.0x000001&indx=1&recIds=ETOCvdc_100098852791.0x000001

XAS and XMCD studies of magnetic properties modifications of Pt/Co/Au and Pt/Co/Pt trilayers induced by Ga+ ions irradiation

Authors: Mazalski, P., Sveklo, I., Kurant, Z., Ollefs, K., Rogalev, A., Wilhelm, F., Fassbender, J., Baczewski, L. T., Wawro, A., Maziewski, A.

Source: JOURNAL OF SYNCHROTRON RADIATION. 22(3):753-759

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCRN374812589&indx=1&recIds=ETOCRN374812589

A multi-stage, first-order phase transition in LaFe11.8Si1.2: Interplay between the structural, magnetic, and electronic degrees of freedom.

Authors: Skokov, K. P., Karpenkov, A. Y., Karpenkov, D. Y., Radulov, I. A., Günzing, D., Eggert, B., Rogalev, A., Wilhelm, F., Liu, J., Shao, Y., Ollefs, K., Gruner, M. E., Wende, H., Gutfleisch, O.

Source: Applied Physics Reviews; Sep2023, Vol. 10 Issue 3, p1-12, 12p

Subject Terms: FIRST-order phase transitions, DEGREES of freedom, MAGNETIC circular dichroism, MAGNETIC alloys, MAGNETIC materials, X-ray absorption

Gd-doped GaN studied with element specificity: Very small polarization of Ga, paramagnetism of Gd and the formation of magnetic clusters

Authors: Ney, A., Kammermeier, T., Ollefs, K., Ney, V., Ye, S., Dhar, S., Ploog, K.H., Röver, M., Malindretos, J., Rizzi, A., Wilhelm, F., Rogalev, A.

Source: In Journal of Magnetism and Magnetic Materials 2010 322(9):1162-1166

Element-Specific Magnetic Hysteresis of Individual 18 nm Fe Nanocubes

Authors: Kronast, F., Friedenberger, N., Ollefs, K., Gliga, S., Tati-Bismaths, L., Thies, R., Ney, A., Weber, R., Hassel, C., Romer, F.M.

Source: NANO LETTERS. 11(4):1710-1715

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCRN295920544&indx=1&recIds=ETOCRN295920544