High Tc SQUID microscope head for room temperature sample

2000 ◽  
pp. 1036-1038
Author(s):  
Tatsuoki Nagaishi ◽  
Hideo Itozaki
Keyword(s):  
Room Temperature ◽  
High Tc ◽  
Room Temperature Sample ◽  
Temperature Sample

The Technology and Storage Stability Studies of Yam Functional Food

2014 ◽  
Vol 687-691 ◽  
pp. 4515-4519
Author(s):  
Jian Chun Zhao
Keyword(s):  
Functional Food ◽  
Room Temperature ◽  
Storage Time ◽  
Storage Stability ◽  
Stability Studies ◽  
Sample Storage ◽  
Room Temperature Sample ◽  
Index Changes ◽  
And Storage ◽  
Temperature Sample

In this paper, yam functional food technology and storage stability were studied, the results indicate that storage time and temperature on the results significantly higher than room temperature sample storage, cryogenic sample index changes significantly, the moisture content of the sample affect the sensory scores larger.

Characterization of Silver Binding in Cryptomelane by X-ray Absorption Spectroscopy

1998 ◽  
Vol 524 ◽  
Author(s):  
R. Ravikumar ◽  
D. W. Fuerstenau ◽  
G. A. Waychunas
Keyword(s):  
Manganese Oxide ◽  
Silver Ions ◽  
Oxide Phase ◽  
Synthetic Sample ◽  
Temperature Spectrum ◽  
X Ray ◽  
Room Temperature Sample ◽  
X Ray Absorption ◽  
Temperature Sample

ABSTRACTUsing silver K-edge extended X-ray absorption fine structure (EXAFS) spectroscopy, two different samples of silver-containing manganese oxide were analyzed in the fluorescence mode. For the first sample, silver ions from solution were sorbed onto one synthetic manganese oxide phase, namely cryptomelane (KxMn8O16, where l<x<2). The second sample was a silvermanganese oxide from Colorado. From the EXAFS analysis, silver was found to occupy two different sites in the synthetic sample. The natural samples from Colorado also exhibited a very similar coordination distances as the synthetic samples. In the low temperature spectrum of the synthetic sample at 10 K, the Ag-O peak was found to be missing and the amplitude of the Ag- Ag peak was approximately three times larger than the corresponding room temperature sample.

scholarly journals Phonons, electrons and thermal transport in Planckian high Tc materials

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Connie H. Mousatov ◽  
Sean A. Hartnoll
Keyword(s):  
Thermal Diffusivity ◽  
Room Temperature ◽  
Phonon Scattering ◽  
Temperature Phase ◽  
Temperature Derivative ◽  
High Tc ◽  
Optimal Doping ◽  
Strong Scattering ◽  
Measured Strength ◽  
Temperature Phase Diagram

AbstractThe room-temperature thermal diffusivity of high Tc materials is dominated by phonons. This allows the scattering of phonons by electrons to be discerned. We argue that the measured strength of this scattering suggests a converse Planckian scattering of electrons by phonons across the room-temperature phase diagram of these materials. Consistent with this conclusion, the temperature derivative of the resistivity of strongly overdoped cuprates is noted to show a kink at a little below 200 K that we argue should be understood as the onset of a high-temperature Planckian T-linear scattering of electrons by classical phonons. This kink continuously disappears toward optimal doping, even while strong scattering of phonons by electrons remains visible in the thermal diffusivity, sharpening the long-standing puzzle of the lack of a feature in the T-linear resistivity at optimal doping associated with the onset of phonon scattering.

Transport Anomalies above Room Temperature and Metal-Insulator Transition of High-Tc Oxides

1994 ◽  
pp. 145-150
Author(s):  
Masatoshi Sato ◽  
Takashi Nishikawa ◽  
Jun Takeda ◽  
Hiroshi Harashina ◽  
Shinichi Shamoto ◽  
...  
Keyword(s):  
Room Temperature ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
High Tc

NORMAL STATE RESISTIVITY OF A QUANTUM ANTIFERROMAGNET IN HIGH Tc CUPREOUS OXIDES

1990 ◽  
Vol 04 (09) ◽  
pp. 591-603
Author(s):  
J. H. XU ◽  
C. S. TING ◽  
D. Y. XING
Keyword(s):  
Spin Wave ◽  
Normal State ◽  
Room Temperature ◽  
Valence Bond ◽  
Normal State Resistivity ◽  
High Tc ◽  
Out Of Plane ◽  
Quantum Antiferromagnet

The normal state in-plane resistivity ρab and the out-of-plane resistivity ρc of high T c cupreous oxides are studied in terms of the interactions between the charged carries and the excitations including phonons in a doped quantum antiferromagnet which can be described by either a resonant valence bond (RVB) state or a quantum Néel state. We found that only in a properly doped quantum Néel state and when the renormalized the speed of spin wave becomes soft, ρab and σc = 1/ρc could have the desired experimental behaviors and depend linearly on T from T c up to room temperature if the quantum Néel state still, persists in high T c samples.

How Reliable is the Cuprates System to Recent Technology?

2016 ◽  
Vol 6 (4) ◽  
pp. 1534
Author(s):  
Emetere M.E. ◽  
Awojoyogbe O.B. ◽  
Uno U.E. ◽  
Isah K.U. ◽  
Sanni E.S. ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Room Temperature ◽  
Engineering Application ◽  
Experimental Results ◽  
Future Research ◽  
Mathematical Approach ◽  
Experimental Room ◽  
High Tc ◽  
High Tc Superconductor

The emergence of cuprates as a high Tc superconductor gave high hopes in the discovery of a room temperature superconductor. It is almost three decades and the highest critical temperature attained on the cuprates is about 135K. A brief overview was conducted on the progress made so far on the cuprates. A mathematical approach was used to design a formula which could determine the experimental results of critical temperature of versed cuprates superconductors. The result of our findings shows that the possibility of attaining the experimental room temperature cuprates superconductor seems very narrow. The study recommended an elaborate approach on the hybridization of cuprates for future research. Hence, there is possibility of having cuprates with wide engineering application.

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