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Investigation of Crystal and Magnetic Structure of BiFeO_{3} Using Neutron Diffraction

100%

Sosnowska I., Przeniosło R., Fischer P., Murashov V. A.

Acta Physica Polonica A

1994

vol. 86

issue 4

629-631

Polycrystalline material obtained from the ground single crystal of BiFeO_{3} reported as not having the superstructure, shows the superstructure reflections in neutron diffraction pattern. The determined magnetic moment of antiferromagnetically ordered Fe^{3+} ions is μ_{Fe} = (3.70±0.03)μ_{B} at 293 K.

Ce_{3}Cu_{3}Sb^{4}: a Canted Antiferromagnetic Semimetal

76%

Wachter P., Degiorgi L., Wetzel G., Schwer H., Mattenberger K., Herrmannsdörfer T., Fischer P.

Acta Physica Polonica A

2000

vol. 97

issue 1

43-58

It has been claimed by Patil et al., that Ce_{3}Cu_{3}Sb_{4} is the first Ce-based semiconducting ferromagnet. In this paper it is shown, mainly with Hall effect and far infrared spectroscopy that no gap in the excitation spectrum exists, as well above as below the magnetic ordering temperature. A maximum in the resistivity near T_{C} is due to trapped magnetic polarons. The resistivity is an effect of the mobility of the charge carriers. The structure of the magnetic unit cell has been determined with elastic neutron scattering.

X-MCD Study of Expanded Lattice Permanent Magnet Materials

76%

Kapusta C., Mycielski R., Porębska B., Ahlers D., Attenkofer K., Fischer P., Schütz G.

Acta Physica Polonica A

1997

vol. 91

issue 5

975-979

X-ray magnetic circular dichroism measurements on the cobalt (iron) K edges and samarium L_{2}, L_{3} edges of Sm_{2}Fe_{17}, Sm_{2}Co_{17} and their interstitial hydrides and nitrides are reported. Normal absorption profiles show considerable changes upon nitriding for iron- and cobalt K edge and for samarium L_{2}, L_{3} edges. Much weaker changes are observed upon hydriding. Similarly, significant differences of X-MCD spectra appear between the host Sm_{2}Fe_{17} (Sm_{2}Co_{17}) and the nitrides, whereas X-MCD signals of the hydrides are similar to those of the hosts. The effects are analysed and discussed in terms of influence of interstitial atom neighbours on the Co(Fe) 4p and Sm 5d electronic bands.

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3 Acta Physica Polonica A

1 2000

1 1997

1 1994

3 Fischer P.

1 Ahlers D.

1 Attenkofer K.

1 Degiorgi L.

1 Herrmannsdörfer T.

1 Kapusta C.

1 Mattenberger K.

1 Murashov V. A.

1 Mycielski R.

1 Porębska B.

1 Przeniosło R.

1 Schwer H.

1 Schütz G.

1 Sosnowska I.

1 Wachter P.

1 Wetzel G.

Search results

Investigation of Crystal and Magnetic Structure of BiFeO_{3} Using Neutron Diffraction

Ce_{3}Cu_{3}Sb^{4}: a Canted Antiferromagnetic Semimetal

X-MCD Study of Expanded Lattice Permanent Magnet Materials