Dresden 2017 – scientific programme
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MA: Fachverband Magnetismus
MA 65: Poster 2
MA 65.10: Poster
Friday, March 24, 2017, 09:30–13:00, P2-OG1
Dilatometry in very high magnetic fields ... an overview — •Mathias Doerr1, Sergey Granovsky1, Martin Rotter1,2, Thomas Stöter1, Sergey Zherlitsyn3, and Zhaosheng Wang3 — 1Technische Universität Dresden, Institut für Festkörperphysik, D-01062 Dresden, Germany — 2McPhase-project (www.mcphase.de) Dresden, Germany — 3Helmholtz-Zentrum Dresden-Rossendorf, Hochfeld-Magnetlabor (HLD-EMFL), PF 510119, D-01314 Dresden, Germany
Investigations of the changes in lattice constants or crystal symmetries of solids complement macroscopic measurements of electronic properties and often accompany ultrasound experiments. We give an overview on how the dilatometric methods have been developed in the last decade. The capacitive dilatometry can be used in steady fields with a resolution better than 10−8. Especially for the highest available (pulsed) fields of about 100 T, optical methods, such as for example the FBG (fibre bragg grating) technology, were developed with a resolution better than 10−6. Modern dilatometer constructions with a diameter of 5 mm allow to measure longitudinal and transversal components of the general striction tensor. Additionally, techniques to measure magnetostriction under pressure up to the highest fields are tested by scientific groups now. New results (GdSb, CeCu2Ge2, Ho2Ti2O7 etc.) are discussed. The data are important to determine magnetic phase diagrams or show how lattice distortions influence the high-field properties of solids.