Ultrafine MnWO4 nanoparticles and their magnetic properties

Ungelenk J, Roming S, Adler P, Schnelle W, Winterlik J, Felser C, Feldmann C (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Solid State Sciences Elsevier

Book Volume: 46

Pages Range: 89-94

DOI: 10.1016/j.solidstatesciences.2015.06.004

Abstract

Ultrafine nanoparticles of MnWO4, a compound showing low-temperature multiferroicity in the bulk, were synthesized by the polyol method. Studies using powder X-ray diffraction, scanning and transmission electron microscopy, dynamic light scattering, differential sedimentation and sorption techniques show the formation of a single-phase material, which is composed of MnWO4 nanoparticles with a prolate ellipsoidal shape (short axis of 4-5 nm, long axis of 11-12 nm) and an unprecedented high specific surface area of 166 m2 g-1. The as-prepared MnWO4 nanoparticles are readily crystalline after the liquid-phase synthesis. Temperature and field dependent magnetization measurements indicate antiferromagnetic behavior with a single magnetic phase transition near TN ≈ 6 K. In contrast, three successive transitions below 14 K were reported for multiferroic bulk-MnWO4. Above TN, the nanoparticles show Curie-Weiss-type paramagnetic behavior. Due to the large paramagnetic moment of Mn2+ (μeff ≈ 6.2 μB), the nanoparticles can be easily manipulated by a bar magnet at ambient temperature.

Involved external institutions

Karlsruhe Institute of Technology (KIT) DE Germany (DE) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE)

How to cite

APA:

Ungelenk, J., Roming, S., Adler, P., Schnelle, W., Winterlik, J., Felser, C., & Feldmann, C. (2015). Ultrafine MnWO4 nanoparticles and their magnetic properties. Solid State Sciences, 46, 89-94. https://dx.doi.org/10.1016/j.solidstatesciences.2015.06.004

MLA:

Ungelenk, Jan, et al. "Ultrafine MnWO4 nanoparticles and their magnetic properties." Solid State Sciences 46 (2015): 89-94.

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