title: Negative thermal expansion and magnetostriction in the frustrated spinel ZnCr2(Se1-x S x )4 (0  ≤  x  ≤  0.1).
abstract: The bond-frustrated ZnCr2Se4 displays strong spin-lattice coupling characterized by large magnetostriction and negative thermal expansion. Here, we report on systematic investigations on the magnetization, heat capacity, thermal expansion and magnetostriction of single crystalline ZnCr2(Se1-x S x )4 (0  ⩽  x  ⩽  0.1) to study the evolution of its spin-lattice coupling with sulfur substitution. We show that with increasing sulfur content, the antiferromagnetic ordering is gradually replaced by a spin-glass state, the temperature region of the negative thermal expansion expands, and the magnetostriction is gradually suppressed. These phenomena are explained qualitatively by taking into account the enhancement of the antiferromagnetic interactions and bond disorder introduced by sulfur substitution.
authors.affiliation: High Magnetic Field Laboratory and University of Science and Technology of China, Hefei 230026, People's Republic of China.
authors.forename: Chuanchuan
authors.initials: C
authors.lastname: Gu
authors.forename: Zhaorong
authors.initials: Z
authors.lastname: Yang
authors.forename: Xuliang
authors.initials: X
authors.lastname: Chen
authors.forename: L I
authors.initials: LI
authors.lastname: Pi
authors.forename: Yuheng
authors.initials: Y
authors.lastname: Zhang