A study of the density of states of ZnCoO:H from resistivity measurements

Cheon, M.; Cho, Yong; Park, Chul‐Hong; Cho, Chae Ryong; Jeong, Se–Young

doi:10.1039/c7ra12866e

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…The presence of H-atoms in the crystal as a source of magnetism is dismissed, as an explicit magnetic ordering is observed in our sample, which is not by the contributions of H-atoms alone. Moreover, previous studies reveal that the hydrogen-related impurities/defects play an important role in the electronic and magnetic properties of the organic (d 0 )/inorganic (d n ) systems. − Based on the first-principles pseudopotential calculations, a weak ferromagnetic interaction may be induced in the system because of the hydrogen-mediated spin–spin interaction . Usually, the interstitial hydrogen can mediate a short-range ferromagnetic spin–spin interaction between neighboring magnetic species through the formation of a bridge bond.…”

Section: Results and Discussionmentioning

confidence: 99%

Anisotropic Ferromagnetic Organic Nanoflowers

et al. 2022

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We report a weak anisotropic ferromagnetic behavior in a purely organic molecule at room temperature, a property rarely reported in organic nanomaterials. The reported 1,2-bis(tritylthio)ethane, forming plate- and organic-flower-like morphologies at the nanolevel, is the first organic crystal with an inherent magnetic property at 300 and 2 K. However, at low temperatures, the magnetization value [M max(T) ∼ 116 emu/mol at 2 K] increases drastically at 3 orders higher compared to 300 K. Interestingly, the system exhibits strong anisotropy with an anisotropic constant, K 1 ∼ 3.25 × 103 erg/cc, and anisotropy field, H K ∼ 3.25 kOe. Below 10 K, this system displays unusual temperature dependence of the coercive field [H C(T)] and remanence magnetization [M R(T)] with a hysteresis-peak anomaly (T* ∼ 10–15 K) due to the enhanced spin–orbit coupling. The maximum H C and M R at T* were H C = 220 Oe and M R ∼ 12 emu/mol, respectively. Beyond T*, H C(T) and M R(T) drop continuously and become negligible as the measurement temperature approaches 300 K. Our results demonstrate that the triphenyl molecules can be further exploited for the design and synthesis of organic magnets for possible applications in spintronics and memory storage devices.

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