[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

Journal of Physics Condensed Matter: Preface

IN view of the interest attaching to the vaporisation and diffusion of solids, the following observations may be worthy of record.

The Diffusion of Solids

Current-induced effective magnetic fields can provide efficient ways of electrically manipulating the magnetization of ultrathin magnetic heterostructures. Two effects, known as the Rashba spin orbit field and the spin Hall spin torque, have been reported to be responsible for the generation of the effective field. However, a quantitative understanding of the effective field, including its direction with respect to the current flow, is lacking. Here we describe vector measurements of the current-induced effective field in Ta|CoFeB|MgO heterostructrures. The effective field exhibits a significant dependence on the Ta and CoFeB layer thicknesses. In particular, a 1 nm thickness variation of the Ta layer can change the magnitude of the effective field by nearly two orders of magnitude. Moreover, its sign changes when the Ta layer thickness is reduced, indicating that there are two competing effects contributing to it. Our results illustrate that the presence of atomically thin metals can profoundly change the landscape for controlling magnetic moments in magnetic heterostructures electrically.

▲Current-induced effective field vector in Ta│CoFeB│MgO

Impact of selenization pressure on the micro-structural properties of Cu2ZnSnSe4 thin films

Detailed Study of Reactively Sputtered ScN Thin Films at Room Temperature

Amorphous Fe85Zr15 alloy thin films prepared by co-sputtering of Fe and Zr using ion beam sputtering technique show excellent surface properties. The crystallization behaviour of the films depicts a two step crystallization process – in the first step bcc-Fe precipitates out, while in the second step the remaining amorphous phase transforms into an intermetallic Fe2Zr alloy along with bcc-Fe phase. The magnetization measurement of the film shows that there is no significant change in the M-H loop of after the first step of crystallization, however after the second step of crystallization the coercivity increases drastically and the behaviour switches from soft-to-hard magnetic. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Structural and magnetic properties of ion‐beam sputtered FeZr thin films

Study of carbon doped cobalt mononitride thin films

The quest for low power consumption devices with new functionalities has made the negative capacitance (NC) effect, the most captivating and studied phenomenon. The NC effect is observed in Cu–TiC thin film at a low-frequency range between 112.9 Hz and 2 kHz. The Cu–TiC thin film was deposited on Si (100) substrate by DC magnetron co-sputtering process and then annealed in a vacuum at different temperatures (100–600°C). The magnitude of NC increased from −0.016 to −27.5 µF after annealing. The NC behaviour is also observed in the forward biased region of the capacitance–voltage (C–V) characteristics. The current–voltage (I–V) characteristics reveal the decreasing static and dynamic resistance for higher annealed films. An improved electrical conductivity (27.70 × 103 to 384.62 × 103 S m−1) is evidenced with decreasing ideality factor (2.01–0.55) in the post-annealed films. The films were found to be polycrystalline from X-ray diffraction patterns with Cu and TiC phases. Raman studies have also confirmed the presence of Cu and TiC vibrational modes in all films. The intensity of C peaks detected at 1359 cm−1 (D peak) and at 1590 cm−1 (G peak) in the as-deposited film decreased after annealing. The annealing effect reduced the amount of unreacted carbon and contributed to form stoichiometric TiC from non-stoichiometric TiC.

Mukul Gupta

Papers

Impact of selenization pressure on the micro-structural properties of Cu2ZnSnSe4 thin films

Detailed Study of Reactively Sputtered ScN Thin Films at Room Temperature

Structural and magnetic properties of ion‐beam sputtered FeZr thin films

Study of carbon doped cobalt mononitride thin films

Negative capacitance effect of Cu–TiC thin film deposited by DC magnetron plasma