نتایج جستجو برای: high k dielectric

تعداد نتایج: 2396257  

Journal: :IOP Conference Series: Materials Science and Engineering 2010

2005
David Vanderbilt Xinyuan Zhao Davide Ceresoli

We first review earlier work in which we computed the first-principles structural, vibrational, and lattice dielectric properties of the cubic, tetragonal, and monoclinic phases of ZrO2 and HfO2. We then discuss two approaches to the construction of realistic models of amorphous ZrO2: a bmelt-and-quenchQ ab-initio molecular dynamics approach, and an bactivation–relaxation techniqueQ. The struct...

2017
L. Liu H. Fang L. Fang H. Dammak Mäı Pham-Thi Laijun Liu Huiqing Fan Liang Fang Hichem Dammak Mai Pham-Thi

Dielectric spectroscopy was applied to porous nanocrystalline Na0.5K0.5NbO3 (NKN) ceramic green body, wherein influences of percolation effect and water adsorption at pore surface of the ceramic green body on dielectric response were examined over wide temperature (150 to 450 K) and frequency (100 Hz to 1 MHz) ranges. Dielectric permittivity of the ceramic green body is about 2–3 orders of magn...

2008
Xuefeng Zhang Se Hyuk Im Rui Huang Paul S. Ho

The exponential growth in device density has yielded high-performance microprocessors containing two billion transistors [1]. The path toward such integration continues to require the implementation of new materials, processes, and design for interconnect and packaging structures. Since 1997, copper (Cu), which has a lower resistivity than aluminum (Al), has been selected as an interconnect mat...

Journal: :Dalton transactions 2015
Ping-Ping Shi Qiong Ye Qiang Li Hui-Ting Wang Da-Wei Fu Yi Zhang Ren-Gen Xiong

Three analogue N-heterocyclic complexes, 1-propyl-1-methylpiperidinium perchlorate (, [PMpip][ClO4]), 1-cyanomethyl-1-methylpiperidinium perchlorate (, [CMpip][ClO4]), and 1-cyanomethyl-1-methylmorpholinium perchlorate (, [CMmor][ClO4]) are identified as phase transition materials displaying switchable dielectric behaviors. Despite the common [ClO4](-) anion and the closely related cations, com...

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