Magnetism of Bismuth(III) Oxide-Based Compounds

Abstract:

²⁰⁹Bi NQR experiments, including analysis of zero-field line shapes, Zeeman-perturbed patterns and zero-field spin-echo envelopes were made to examine magnetic splitting of resonances revealed in the spectra of Main group element compounds of general composition Ba_kBi_lA_mO_n (A=Al, В, Ge, Br, Cl). The results were explained assuming the existence in the compounds of ordered internal magnetic fields from 5 to 250 G which notably exceed those of nuclear magnetic moments. A dramatic (8−10-fold) increase in the resonance intensities, instead of broadening and fading, was observed for such compounds upon applying weak (below 500 Oe) external magnetic fields. The effect was shown to relate to the spin dynamics, namely, to the influence of external magnetic field on the nuclear spin-spin relaxation of the compounds with anomalous magnetic properties. In α-Bi₂O₃, paramagnetism depending on the thermal prehistory of a sample was found using SQUID-technique; magnetoelectric effect linear in magnetic field was also observed for this oxide.

• Periodical: Solid State Phenomena (Volumes 233-234)
• Pages: 113-116
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.233-234.113
• Online since: July 2015
• Authors: Eleonora A. Kravchenko*
• Keywords: ²⁰⁹ Bi NQR, Bi (III) Oxygen Compounds, Local Magnetic Fields, Nuclear Quadrupole Relaxation, SQUID

References

[1] Ainbinder N.E., Volgina G.A., Kravchenko E.A., Osipenko A.N., Gippius A.A., Fam Suan Hai, Bush A.A., 209Bi NQR Powder Spectra Influenced by Local and Applied Magnetic Fields, Z. Naturforshch.: Phys. Sci., 49A. (1994) 425-432.

DOI: 10.1515/zna-1994-1-264

[2] E.A. Kravchenko, Yu.F. Kargin, V.G. Orlov, T. Оkuda, K. Yamada, Local Ordered Magnetic Fields in Bismuth Dielectrics. 209Bi NQR in Bi4Ge3O12 Single Crystal, J. Magn. Magn. Mater. 224 (2001) 249-259.

DOI: 10.1016/s0304-8853(00)01350-0

[3] E.A. Kravchenko, V.G. Morgunov, Yu.F. Kargin, A.V. Egorysheva, V.G. Orlov, M.P. Shlykov, NQR Indications of Unconventional Magnetism in Some Bismuth-Вased Diamagnets, Appl. Magn. Res. 27 (2004) 65-75.

DOI: 10.1007/bf03166302

[4] E.A. Kravchenko, V.G. Orlov, M.P. Shlykov, Magnetic Properties of Bismuth(III) Oxy Compounds, Russ. Chem. Rev. 75 (2006) 77-93.

DOI: 10.1070/rc2006v075n01abeh003596

[5] Nizhankovskii, V.I., Kharkovskii, F.I., Orlov, V.G., Magnetoelectric Effect in α-Bi2O3, Ferroelectrics 279 (2002) 157-166.

[6] E.A. Kravchenko, V.G. Morgunov, V.G. Orlov, Yu.F. Kargin, Quadrupole Spin-Echo Envelopes for Bi4Ge3O12 Single Crystals Doped with Atoms of Transition and Rare Earth Elements, JETP Lett. 86 (2007) 390-392.

DOI: 10.1134/s0021364007170122

[7] V.G. Orlov, G.S. Sergeev, Tetsuo Asaji, E.A. Kravchenko, Yu.F. Kargin, Nuclear Quadrupole Spin-Lattice Relaxation in Bi4Ge3O12 Single Crystals Doped with Atoms of d- or f-Elements. Crystal Field Effects in Compounds Exhibiting Anomalous Magnetic Properties, JETP 137 (2010).

DOI: 10.1134/s1063776110020135