[Zurück]

B. Richter, A. Kirste, S. Hansel, M. von Ortenberg, A. Absmeier, W. Linert, R. Grössinger:
"Field induced low-spin high-spin transition";
Journal of Magnetism and Magnetic Materials, 310 (2007), 2 Part III; S. 2731 - 2733.

Field induced low-spin high-spin transition

B.Richter a, A.Kirste a, S.Hansel a, M.von Ortenberg a, A. Absmeier b, W.Linert b, R.Groessinger b
a Humboldt University at Berlin, Magnetotransport in Solids, Newtonstrasse 15, D-12489 Berlin, Germany
b Technical University Vienna, Karslplatz 13, A-1040 Vienna, Austria

Abstract

We have investigated the temperature and magnetic field induced high-spin low-spin transition of μ-Tris(1,4-bis(tetrazol-1-yl)butane-
N4,N4')iron(II)] Bis(hexafluorophosphate) in transient megagauss fields using optical reflection measurements at μ = 0.632 and 0.541 μm radiation.The experimental setup uses plastic optical fiber (POF) in an environment between 140 and 200K. For sample temperature
within this transition range magnetic field induced small reflection changes with strong hysteresis were detected.Evidently the
strong (160 T) but short (5 μs) magnetic field pulse cannot drive the transition into saturation.Using magnetic field pulses with
different time constants the dynamic process could be studied.For [μ-Tris(1,4-bis(tetrazol-1-yl)butane-N4,N40)iron(II)] Bis(hexafluorophosphate) it was found that the solvent used in the actual production process of the material had a strong influence on the experimental results.

Low-spin high-spin transition; Megagauss magnetization

http://dx.doi.org/10.1016/j.jmmm.2006.10.963

http://dx.doi.org/10.1016/j.jmmm.2006.10.963