Noncollinear spin structure inSmxTb1−x[Cr(CN)6]∙4H2Ohaving orthogonal single-ion anisotropies
Noncollinear spin structure inSmxTb1−x[Cr(CN)6]∙4H2Ohaving orthogonal single-ion anisotropies
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DOI：
10.1103/physrevb.73.092409
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发表时间：
2006-03
影响因子：
3.7
通讯作者：
T. Hozumi;K. Hashimoto;S. Ohkoshi
中科院分区：
文献类型：
--
作者：
T. Hozumi;K. Hashimoto;S. Ohkoshi
一系列的$ {\ mathrm {Sm}} _ {x} ^ {\ mathrm {3}} {\ mathrm{结核病}}_ {1 \ ensuremath {-} x} ^ {\ mathrm {3}} ({\ mathrm {Cr}} ^ {\ mathrm {3}} (\ mathrm {CN}{)} _{6}]∙4 {\ mathrm {H}} _ {2} \ mathrm {O} $磁铁,在$ {\ mathrm {Sm}} ^ {\ mathrm{3}} $和$ {\ mathrm{结核病}}^ {\ mathrm{3}} $有不同的磁单离子各向异性,是准备。磁序温度$({T}_{c})$从$12.0\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ $(x=0)$下降到$7.4\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ $(x=0.55)$，然后随着$x$的增加增加到$10.2\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ $(x=1)$。磁化$ ({M} _{年代})值5美元\幻影{\规则{0.3 em}{0例}}\ mathrm {K}逐渐减少3.0美元\幻影{\规则{0.3 em}{0例}}{\ ensuremath{\μ}}_ {B} $ $ (x = 0)到1.6美元\幻影{\规则{0.3 em}{0例}}{\ ensuremath{\μ}}_ {B} $ $ x = 1美元。从分子场模型的分析来看，实验值${T}_{c}$和${M}_{s}$的变化趋势表明，本系列具有${\mathrm{Sm}}^{\mathrm{III}}$和${\mathrm{Tb}}^{\mathrm{III}}$两个子晶格磁化方向垂直的非共线自旋结构。
A series of ${\mathrm{Sm}}_{x}^{\mathrm{III}}{\mathrm{Tb}}_{1\ensuremath{-}x}^{\mathrm{III}}[{\mathrm{Cr}}^{\mathrm{III}}(\mathrm{CN}{)}_{6}]∙4{\mathrm{H}}_{2}\mathrm{O}$ magnets, in which ${\mathrm{Sm}}^{\mathrm{III}}$ and ${\mathrm{Tb}}^{\mathrm{III}}$ have different magnetic single-ion anisotropies, was prepared. Magnetic ordering temperatures $({T}_{c})$ decreased from $12.0\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ $(x=0)$ to $7.4\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ $(x=0.55)$ and then increased to $10.2\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ $(x=1)$ with increasing $x$. The magnetization $({M}_{s})$ values at $5\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ gradually decreased from $3.0\phantom{\rule{0.3em}{0ex}}{\ensuremath{\mu}}_{B}$ $(x=0)$ to $1.6\phantom{\rule{0.3em}{0ex}}{\ensuremath{\mu}}_{B}$ $(x=1)$. These trends of experimental ${T}_{c}$ and ${M}_{s}$ values suggest that the present series takes a noncollinear spin structure, in which the directions of the ${\mathrm{Sm}}^{\mathrm{III}}$ and ${\mathrm{Tb}}^{\mathrm{III}}$ sublattice magnetizations are perpendicular, from the analysis of the molecular-field model.