Počet záznamů: 1

A high-field magnetization study of a Nd.sub.2./sub.Fe.sub.14./sub.Si.sub.3./sub. single crystal

  1. 1.
    0330654 - FZU-D 2010 RIV GB eng J - Článek v odborném periodiku
    Andreev, Alexander V. - Yoshii, S. - Kuz'min, M.D. - de Boer, F.R. - Kindo, K. - Hagiwara, M.
    A high-field magnetization study of a Nd2Fe14Si3 single crystal.
    [Vysokopolní studium magnetizace monokrystalu Nd2Fe14Si3.]
    Journal of Physics-Condensed Matter. Roč. 21, č. 14 (2009), 146005/1-146005/8 ISSN 0953-8984
    Grant CEP: GA ČR GA202/09/0339
    Grant ostatní: DFG(DE) RI 932/4-1
    Výzkumný záměr: CEZ:AV0Z10100520
    Klíčová slova: magnetization * Nd2Fe14Si3
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 1.964, rok: 2009

    Magnetization study of a single crystal of Nd2Fe14Si3 reveals that the compound is a ferromagnet with a spontaneous magnetic moment of 32.3 mB per formula unit (at T=2 K) and a Curie temperature equal to 495 K. The easy magnetization direction lies close to the b-axis, tilting slightly towards the c axis. (The b axis [120] is not a high-symmetry direction in the crystallographic class D3d.). The observed strong magnetic anisotropy is attributed almost entirely to the Nd sublattice, as concluded from comparison with a Y2Fe14Si3 single crystal. A magnetic field applied along the c axis induces a first-order spin reorientation transition at BFOMP = 20 T. In the process of magnetization the Nd and Fe sublattices behave as essentially non-collinear. This is manifest particularly in the downward curvature of the first (pre-FOMP) stage of the magnetization curve. It is proposed to regard this curvature as a validity criterion for the single-sublattice approximation.

    Studium magnetizace Studium magnetizace Nd2Fe14Si3 ukazuje, že sloučenina je ferromagnetická se spontánním magnetickým momentem 32.3 mB/f, TC = 495 K a osa snadné magnetizace je blízko ke směru b-osy. Velkou magnetickou anizotropii lze téměř cele připsat podmřížce Nd. Magnetické pole podél c osy indukuje spinovou reorientaci prvého druhu při 20 T.
    Trvalý link: http://hdl.handle.net/11104/0176390