Contact

Dr. Wilhelmus A. G. Kampert
e.kampertAthzdr.de
Phone: +49 351 260 - 3541

Julia Blöcker
Secretary/ Administration
j.bloeckerAthzdr.de
Phone: +49 351 260 - 3527
Fax: +49 351 260 - 13527

Nicole Zimmermann
Sekretariat/Administration
n.zimmermannAthzdr.de
Phone: +49 351 260 - 3535

Scientists@work

This week, we are happy to welcome:

Name: Badih Assaf
Ecole Normale Supérieure Paris


Name: Alexander Mukhin


Name: Dmitry Knyazev
P.N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow

Next Call

Launch: 15. April, 2016

Deadline: 16. Mai, 2016

Here you find the online proposal form.

Further Information

Magnetostriction

An optical fiber Bragg grating (FBG) method developed at the HLD is used to measure magnetostriction in pulsed magnetic fields. The relative length change ΔL/L can be obtained from the shift of the wavelength of the reflected light in the FBG [1].

 Magnetostriction structure of an optical fiber Bragg grating  Magnetostriction principle of measurement
The structure of an optical fiber Bragg grating.
The principle of the measurement.

Relative length change (magnetostriction) thus is proportional to the relative wavelength change: Δλ/λ ∝ ΔL/L

Resolutions of about ΔL/L ~ 10-7 are achievable.

Standard temperature range is 1.4 – 300 K. Measurements down to ~0.6 K with a 3He system are also possible. This technique can be used in all our magnets.

The sample size should be > 1 mm.

Magnetostriction of single-crystalline LaCoO3   Magnetostriction of single-crystalline LaCoO3 (2)
Magnetostriction of single-crystalline LaCoO3 measured in pulsed magnetic fields. [2]

  

[1] R. Daou et al., Rev.Sci Instum. 81, 033909 (2010)

[2] M. Rotter et al., Sci. Rep. 4, 7003 (2014)