pH-controlled polymorphism in a layered dysprosium phosphonate and its impact on the magnetization relaxation.
pH-controlled polymorphism in a layered dysprosium phosphonate and its impact on the magnetization relaxation.
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DOI：
10.1039/c4cc09341k
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发表时间：
2015-01
影响因子：
4.9
通讯作者：
Dai Zeng;M. Ren;S. Bao;Jian-shen Feng;Li Li-Li;Li‐Min Zheng
中科院分区：
文献类型：
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作者：
Dai Zeng;M. Ren;S. Bao;Jian-shen Feng;Li Li-Li;Li‐Min Zheng
报道了α-Dy(2-qpH)(SO4)(H2O)2(α-Dy)和β-Dy(2-qpH)(SO4)(H2O)2(β-Dy)(2-qpH2=2-喹啉膦酸)(2-qPh2=2-喹啉膦酸)，它们分别以单斜晶系P2₁/c和三斜晶系P1̄空间群结晶。这两种材料在低温下都表现出磁场诱导的慢弛豫磁化强度。β-Dy的势垒是α-Dy的近三倍，这归因于两相的结构差异。
Two polymorphic layered dysprosium phosphonates α-Dy(2-qpH)(SO4)(H2O)2 (α-Dy) and β-Dy(2-qpH)(SO4)(H2O)2 (β-Dy) (2-qpH2 = 2-quinolinephosphonic acid) which crystallize in monoclinic P2₁/c and triclinic P1̄ space groups, respectively, are reported. Both exhibit field-induced slow relaxation of magnetization at low temperature. The energy barrier for β-Dy is nearly three times that for α-Dy, attributed to the structural differences in the two phases.