Constitution and crystal growth of RE2TMSi3 intermetallic compounds

被引：28

作者：

Graw, G ^{[1
]}

Bitterlich, H ^{[1
]}

Löser, W ^{[1
]}

Behr, G ^{[1
]}

Fink, J ^{[1
]}

Schultz, L ^{[1
]}

机构：

[1] Inst Festkorper & Werkstofforsch Dresden, D-01171 Dresden, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 308卷

关键词：

crystal growth; magnetic materials; intermetallic compounds; phase diagram;

D O I：

10.1016/S0925-8388(00)00894-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Rare earth (RE)-transition metal (TM)-silicides RE2TMSi3 (RE = Ce, Tb, Dy; TM = Ni, Pd, Co) exhibit a layered hexagonal AIB(2) structure. RE-TM-Si phase diagram sections relevant for crystallization have been revealed by differential thermal analysis and microstructure investigations. Bulk single crystals of selected compounds were grown by the r.f. floating zone method in order to elucidate the anisotropy of low temperature magnetic ordering phenomena, metamagnetic transitions and magnetoresistive properties. The inferior element segregation along the rod axis is consistent with congruent melting of the RE2TMSi3 intermetallic compounds, which exhibit melting points of 1500 to 1700 degrees C. This conclusion is also supported by in situ tracking or the zone temperature during the growth process. Precipitates of RESi or RESi2 within the single crystalline matrix formed during post-annealing processes could partially be dissolved by annealing up to 1200 degrees C and subsequent quenching. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：193 / 199

页数：7

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