Magnetic structure of geometrically frustrated compound Co2Cl(OH)3 determined by proton NMR

Simulation of coexisting ferromagnetic order and disorder of geometrically frustrated Co2Cl(OH)3

“…These features are in good agreement with the experimental results of Zheng et al [3], Kubo et al [4], and Zenmyo and Tokita [5].…”

“…With regard to Co 2 Cl(OH) 3 Zheng et al [3] concluded that the magnetic structure at low temperatures contained coexisting ferromagnetic and random spins, according to magnetic susceptibility, specific heat, mSR, and neutron diffraction measurements. Later, Kubo et al [4] and Zenmyo and Tokita [5] investigated the magnetic structure of the compound by NMR experiments, and obtained similar results. However, the mechanism of magnetic interactions by which this peculiar magnetic structure is realized remained unclear.…”

Magnetic-field-induced instability of the cooperative paramagnetic state in ZnxCo4−x(OD)Dissanayake1, Chan2, Ji3 et al. 2012Phys. Rev. B8010View full textAdd to dashboardCite

“…On the other hand, our refinement showed that the magnetic structure is different from their "2-1" structure. 12,15 The "2-1" structure should yield magnetic contributions at (0 0 L) (L = 3n, n is a integer), but as shown in the inset of Fig. 1(a) those peaks do not show any increase below T N .…”

Crystal Structure and Magnetic and Magnetocaloric Properties of Cobalt Hydroxychlorides Co2(OH)4–xClx

“…Zheng et al suggested that the “distortion” in the tetrahedron of Co 2+ ions might be the reason for the magnetic structure of this compound; partial ferromagnetic long‐range order among spins in the triangular planes coexists with random disorder among those in Kagomé planes. Furthermore, Zenmyo et al performed a proton nuclear magnetic resonance spectroscopy analysis on Co 2 (OH) 3 Cl, from which they discovered that the magnetic state of Co 2 (OH) 3 Cl is different from the “spin ice” state in that the magnetic moments are not directed towards the body center of the tetrahedron. In addition, the magnetic moments of the Co 2+ ions in the triangular planes are smaller than those of the ions in the Kagomé planes; the Co 2+ ions located in triangular and Kagomé planes are often referred to as “triangular Co 2+ ions” and “Kagomé Co 2+ ions”, respectively; these denominations will also be used in this paper.…”

“…As reported in several experimental studies on Co 2 (OH) 3 Cl, the samples have been typically prepared by mixing a CoCl 2 solution with a precipitation agent such as NaOH or Mg(OH) 2 ; however, the synthesis conditions have been inconsistent, and systematic investigations on the sample preparation process have rarely been conducted in the past. In addition, new cobalt hydroxyl salts with compositions different from Co 2 (OH) 3 Cl might be successfully synthesized.…”