Intricate Magnetic Properties of Some Rare Earth Dodecaborides

Autor: N. Y. Shitsevalova, Y. Paderno, A. Czopnik, Konrad Siemensmeyer, Karol Flachbart, S. Matas, I. Baťko, Slavomír Gabáni, M. Meissner
Rok vydání: 2004
Předmět:
Zdroj: Czechoslovak Journal of Physics. 54:273-278
ISSN: 1572-9486
0011-4626
DOI: 10.1007/s10582-004-0080-9
Popis: We have investigated the magnetic structure of the fcc - antiferromagnet HoB12 and of some other dodecaborides by specific heat and magnetisation measurements, and by neutron diffraction. Specific heat and magnetisation measurements up to 8 T show three magnetic phases in the B vs. T phase diagram. Powder neutron diffraction in zero magnetic field reveals an antiferromagnetic structure with basic reflections (0 2/3 2/3) and (2/3 1/3 2/3). In the lowest field magnetic phase the principal reflections remain, in higher magnetic field they become suppressed. Moreover, the magnetic background strongly decreases with applied field indicating that in zero field a part of the magnetic moments remains uncorrelated. Recent neutron diffraction investigations on a single crystalline sample reveal an incommensurate amplitude - modulated magnetic structure of HoB12.
Databáze: OpenAIRE
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