Magnetic field-induced instability of the cooperative paramagnetic state in Zn$_x$Co$_{4-x}$(OD)$_6$Cl$_2$

S. E. Dissanayake; C. Chan; S. Ji; J. Lee; Y. Qiu; K. C. Rule; B. Lake; M. Green; M. Hagihala; X. G. Zheng; T. K. Ng; S. -H. Lee

doi:10.1103/PhysRevB.85.174435

paper

Magnetic field-induced instability of the cooperative paramagnetic state in Zn $_{x}$ Co $_{4 - x}$ (OD) $_{6}$ Cl $_{2}$

arXiv:1203.6384 · doi:10.1103/PhysRevB.85.174435

Abstract

Using elastic and inelastic neutron scattering techniques with and without application of an external magnetic field $H$ , the magnetic ground states of Zn $_{x}$ Co $_{4 - x}$ (OD) $_{6}$ Cl $_{2}$ ( $x = 0, 1$ ) were studied. Our results show that for $x = 0$ , the ground state is a magnetic long-range ordered (LRO) state where each tetrahedron forms an "umbrella"-type structure. On the other hand, for $x = 1$ , no static ordering was observed down to 1.5 K, which resembles the behavior found in the isostructural quantum system Zn $_{x}$ Cu $_{4 - x}$ (OD) $_{6}$ Cl $_{2}$ . When $H$ field is applied, however the $x = 1$ system develops the same LRO state as $x = 0$ . This indicates that the $x = 1$ disordered state is in the vicinity of the $x = 0$ ordered state.

5 pages, 4 figures, 1 table

Magnetic field-induced instability of the cooperative paramagnetic state in Znx​Co4−x​(OD)6​Cl2​

Abstract

References in corpus (8)

Magnetic field-induced instability of the cooperative paramagnetic state in Zn $_{x}$ Co $_{4 - x}$ (OD) $_{6}$ Cl $_{2}$