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Neil D. Mathur and Xavier Moya

Magnetoelectric effects arise when magnetic and electrical signals are interconverted using materials, with possible applications that include data storage and magnetic-field sensing. We primarily study ferromagnetic films that experience voltage-driven strain from ferroelectric underlayers. The resulting magnetic changes are imaged using magnetic force microscopy (MFM) and photoemission electron microscopy (PEEM). This latter technique relies on x-ray magnetic circular dichroism (XMCD) to achieve magnetic contrast, and is performed through close collaboration with Sarnjeet Dhesi at Diamond Light Source (UK).

Magnetic domains in a manganite film

The image shows magnetic domains in a manganite film whose magnetization is inhomogeneous in magnitude. Field of view has diameter 6 mm. After Nature Materials 12 (2013) 52-58.



Perpendicular magnetization under voltage control in Ni films on ferroelectric BaTiO3 substrates M. Ghidini, F. Maccherozzi, X. Moya, L. C. Phillips, W. Yan, J. Soussi, N. Métallier, M. E. Vickers, N.-J. Steinke, R. Mansell, C. H. W. Barnes, S. S. Dhesi, N. D. Mathur Advanced Materials 27 (2015) 1460–1465

Non-volatile electrically driven repeatable magnetization reversal with no applied magnetic field M. Ghidini, R. Pellicelli, J. L. Prieto, X. Moya, J. Soussi, J. Briscoe, S. Dunn and N. D. Mathur Nature Communications 4 (2013) 1453 pages 1-7

Giant extrinsic reversible magnetocaloric effects in La0.7Ca0.3MnO3 films due to strain X. Moya, L. E. Hueso, F. Maccherozzi, A. I. Tovstolytkin, D. I. Podyalovskii, C. Ducati, L. C. Phillips, M. Ghidini, O. Hovorka, A. Berger, M. E. Vickers, S. S. Dhesi and N. D. Mathur Nature Materials 12 (2013) 52-58

Equivalence of direct and converse magnetoelectric coefficients in strain-coupled two-phase systems Jing Lou, Gerry N. Pellegrini, Ming Liu, Neil D. Mathur and Nian X. Sun Applied Physics Letters 100 (2012) 102907 pages 1-2

Eliminating the temperature dependence of the response of magnetoelectric magnetic-field sensors C. Israel, S. Kar-Narayan and N. D. Mathur IEEE Sensors 10 (2010) 914-917

A one-cent room-temperature magnetoelectric sensor C. Israel, N. D. Mathur and J. F. Scott Nature Materials 7 (2008) 93-94

Giant sharp and persistent converse magnetoelectric effects in multiferroic epitaxial heterostructures W. Eerenstein, M. Wiora, J. L. Prieto, J. F. Scott and N. D. Mathur Nature Materials 6 (2007) 348-351

Multiferroic and magnetoelectric materials W. Eerenstein, N. D. Mathur and J. F. Scott Nature 442 (2006) 759-765