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Invited Lecture

Similarities and differences between magnetic hysteresis and hysteresis in phase transformations

Wednesday (07.06.2017)
12:20 - 13:00 Förde II + III
Part of:
12:20 Invited Lecture Similarities and differences between magnetic hysteresis and hysteresis in phase transformations 0 Richard James
13:00 Invited Lecture Discovery and Design of Multifunctional Materials using Combinatorial and High-Throughput Experimentation 1 Prof. Dr. Alfred Ludwig
15:10 Invited Lecture Tuning Mechanical Properties of Spider Cuticle by its Composition and by Structural Gradients 0 Dr. Yael Politi
15:50 Invited Lecture Surfaces and Gels for controlling Calcium Phosphate Deposition 0 Prof. Dr. Andreas Taubert
17:40 Invited Lecture Probing the Structure and Dynamic Behaviors of Ferroelectrics by Electron Microscopy with Atomic Resolution in Real Time 0 Prof. Xiaoqing Pan
18:20 Invited Lecture Magnetoelectric Composites for Energy Harvesting 1 Dr. Shashank Priya
19:40 Invited Lecture Declamping in Lead Magnesium Niobate – Lead Titanate Films 1 Prof. Susan Trolier-McKinstry
20:20 Invited Lecture Integrated Magnetics and Multiferroics for Compact and Power Efficient Sensing, Power, RF, Microwave and mm-Wave Electronics 0 Prof. Nian X. Sun
21:00 Invited Lecture From Maxwell’s displacement current to nanogenerator driven self-powered systems and blue energy 0 Prof. Zhong Lin Wang
21:40 Invited Lecture Magnetoelectric Composites: from Sensors to Sensor Systems 0 Prof. Dr.-Ing. Gerhard Schmidt
22:20 Invited Lecture Metal–insulator transition in vanadium oxides films and its applications 1 Dr. Keisuke Shibuya
00:20 Invited Lecture In operando photoemission spectroscopy of PMN-PT interfaces 0 Prof. Dr. Kai Rossnagel
08:30 Invited Lecture Titanium-Tantalum High Temperature Shape Memory Spring Actuators 1 Prof. Dr. Gunther Eggeler
09:10 Invited Lecture Vortex-antivortex topological structures in multiferroic tunnel junctions 1 Dr. Ana Sanchez
09:50 Invited Lecture Artificial Ferroic Systems 1 Prof. Laura Heyderman
17:40 Invited Lecture Biomimicry at the molecular level: Molecularly imprinted polymers as synthetic antibody mimics 0 Karsten Haupt
Session Chair

Topic Invited Lecture:
Belongs to:

Richard D. James1 Vivekanand Dabade2 and Xian Chen32 Department of Aerospace Engineering and Mechanics, 110 Union St. SE, Minneapolis, MN 55455, USA

3 Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

We discuss possible analogs between magnetic hysteresis in soft magnetic materials and hysteresis in phase transformations.  Recent work on the hysteresis in phase transformations indicates that an energy barrier associated to a large localized disturbance plays a central role, and this barrier is sensitive to conditions of compatibility.  It was once believed that a similar explanation was relevant to magnetic hysteresis.  However, detailed quantitative studies of the barrier based on linear stability analysis did not support this idea – the resulting discrepancy was called the “Coercivity Paradox”.  We think the basic idea was correct (supported also by [1]) but the use of linear stability analysis was wrong.  We therefore revisit the existence of energy barriers in soft magnetism and suggest a quantitative resolution of the coercivity paradox. [1] Nicholas Pilet, The relation between magnetic hysteresis and the micromagnetic state, explored by quantitative magnetic force microscopy, Thesis, University of Basel (2006)[2] Chen, X., Srivastava, V., Dabade, V. & James, R. D. Study of the cofactor conditions: conditions of supercompatibility between phases. J. Mech. Phys. Solids (2013)[3] Zhang, Z., R. D. James and S. Mueller, Energy barriers and hysteresis in martensitic phase transformations, Overview 147, Acta Materialia 57 (2009) 4332–4352 
Funded by NSF and the RDF Fund of the Institute of the Environment 






Richard James
University of Minnesota