Ternary lithium nitridocuprates, Li3-x-yCuxN:: crystal growth, bulk synthesis, structure and magnetic properties

被引:24
作者
Gordon, AG
Gregory, DH [1 ]
Blake, AJ
Weston, DP
Jones, MO
机构
[1] Univ Nottingham, Sch Chem, Nottingham NG7 2RD, England
[2] Univ Nottingham, Sch Mech Mat Mfg Engn & Management, Nottingham NG7 2RD, England
[3] Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, England
[4] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England
来源
INTERNATIONAL JOURNAL OF INORGANIC MATERIALS | 2001年 / 3卷 / 07期
基金
英国工程与自然科学研究理事会;
关键词
nitrides; synthesis; structure; diffraction;
D O I
10.1016/S1466-6049(01)00081-2
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Systematic studies within the ternary Li-Cu-N system have examined the effects of varying starting materials, transition metal stoichiometry, reaction temperature/duration and cooling rate on crystal growth and bulk phase formation of ternary nitridocuprates. Resulting lithium transition metal compounds, Li(3-x-y)square yCuxN (square = Li vacancy), have been characterised by single crystal and powder XRD. The maximum copper substituent level (x approximate to 0.45) and vacancy level, y, appear insensitive to reaction temperature. Both vacancies and copper are disordered with Li when reaction mixtures are quenched (alpha -Li3N-type: P6/mmm, a approximate to 3.7 Angstrom, c approximate to 3.8 Angstrom, Z = 1), whereas evidence of copper and/or vacancy ordering exists on slow cooling. Morphology of crystallites has been evaluated by SEM and magnetic properties have been investigated using SQUID magnetometry. Magnetic data show compounds exhibit temperature dependent paramagnetism in contrast to the parent nitride, Li3N. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:973 / 981
页数:9
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