title: pH-controlled polymorphism in a layered dysprosium phosphonate and its impact on the magnetization relaxation.
abstract: 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.
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China. lmzheng@nju.edu.cn.
authors.forename: Dai
authors.initials: D
authors.lastname: Zeng
authors.forename: Min
authors.initials: M
authors.lastname: Ren
authors.forename: Song-Song
authors.initials: SS
authors.lastname: Bao
authors.forename: Jian-Shen
authors.initials: JS
authors.lastname: Feng
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Li-Min
authors.initials: LM
authors.lastname: Zheng