Berlin 2012 – scientific programme

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MA: Fachverband Magnetismus

MA 20: Poster I - Biomagnetism, FePt Nanoparticles, Magnetic Particles/Clusters, Magnetic Materials, Magnetic Semiconductors, Half-metals/Oxides, Multiferroics, Topological Insulators, Spin structures/Phase transitions, Electron theory/Computational micromagnetics, Magnetic coupling phenomena/Exchange bias, Spin-dependent transport, Spin injection/spin currents, Magnetization/Demagnetization dynamics, Magnetic measurement techniques

MA 20.2: Poster

Tuesday, March 27, 2012, 12:15–15:15, Poster A

High-field ESR and magnetization of a Mn(III)-based single chain magnet — •Y. Krupskaya¹, Z. Tomkowicz², M. Rams², M. Balanda³, S. Foro⁴, Y. Skourski⁵, J. Wosnitza⁵, S.K. Nayak⁶, J.V. Yakhmi⁷, W. Haase⁶, V. Kataev¹, and B. Büchner¹ — ¹IFW Dresden, Dresden, Germany — ²Institute of Physics, Jagiellonian University, Kraków, Poland — ³H. Niewodniczański Institute of Nuclear Physics PAN, Kraków, Poland — ⁴Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Darmstadt, Germany — ⁵Dresden High Magnetic Field Laboratory, Rossendorf, Germany — ⁶Eduard-Zintl Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Darmstadt, Germany — ⁷Technical Physics and Prototype Engineering Division, Bhabha Atomic Research Centre, Mumbai, India

We present high-field magnetic study of a Mn(III)-based molecular chain. The compound shows a ferromagnetic hysteretic behavior of the magnetization at relatively high temperatures (up to 3 K). High-field/high-frequency ESR measurements were performed at the excitation frequencies between 332 and 528 GHz in magnetic fields up to 15 T. The frequency dependence of the ESR spectrum yields a g-factor of 1.8 and a negative effective magnetic anisotropy D of around −6.37 K. In addition, pulsed field (up to 60 T) magnetization measurements enabled determination of the effective spin value corresponding to the ground state of the chain. In conclusion, our experimental results indicate the single molecular chain magnet behavior of the studied compound.