Materials Science Applications of the New National Institute of Standards and Technology Powder Diffractometer

1994 ◽  
Vol 376 ◽  
Author(s):  
J. K. Stalick ◽  
E. Prince ◽  
A. Santoro ◽  
I. G. Schroder ◽  
J. J. Rush
Keyword(s):  
Magnetic Field ◽  
High Resolution ◽  
Materials Science ◽  
Superconducting Magnet ◽  
First Year ◽  
Peak Width ◽  
Powder Diffractometer ◽  
Typical Data ◽  
Neutron Powder Diffractometer ◽  
Diffraction Patterns

ABSTRACTThe new high-resolution neutron powder diffractometer BT-1 at the NIST reactor has proven to be a powerful and versatile instrument in its first year of operation. With 32 detectors arranged at 5° intervals and a 12° 2θ scan range, powder diffraction patterns can be collected to 167° 2θ. There is a choice of three monochromator take-off angles (75°, 90°, and 120°) so that the peak-width minimum can be matched to the rf-spacing range that is most important for each sample; all choices have a wavelength close to 1.54 Å. Data can be collected on sample sizes ranging from 200 mg to 30 g. Temperatures of 0.3 K to 1400 K are routinely available, and a magnetic field of 7T can be applied with a superconducting magnet. Typical data collection times range from 1-12 hours depending upon sample size and desired resolution. Examples are given of a variety of materials applications.

Russian-French High Resolution Multi-Section Neutron Powder Diffractometer

2000 ◽  
Vol 321-324 ◽  
pp. 308-313 ◽  
Author(s):  
A.I. Kurbakov ◽  
V.A. Trounov ◽  
T.K. Baranova ◽  
A.P. Bulkin ◽  
R.P. Dmitriev ◽  
...  
Keyword(s):  
High Resolution ◽  
Powder Diffractometer ◽  
Neutron Powder Diffractometer

The New Neutron Powder Diffractometer with a Multi-Detector System for High-Efficiency and High-Resolution Measurements

1998 ◽  
Vol 37 (Part 1, No. 6A) ◽  
pp. 3319-3326 ◽  
Author(s):  
Kenji Ohoyama ◽  
Tomonori Kanouchi ◽  
Keiji Nemoto ◽  
Masayoshi Ohashi ◽  
Tsuyoshi Kajitani ◽  
...  
Keyword(s):  
High Resolution ◽  
High Efficiency ◽  
Detector System ◽  
Powder Diffractometer ◽  
Neutron Powder Diffractometer

The Effect of Pb on the Interface Structure of Fe/Cr(100) Metallic Multilayers

2000 ◽  
Vol 648 ◽  
Author(s):  
Kyu-Young Kim ◽  
Masao Kamiko ◽  
Sang-Mun Oh ◽  
Guang-Hong Lu ◽  
Ryoichi Yamamoto
Keyword(s):  
Magnetic Field ◽  
High Resolution ◽  
Interface Structure ◽  
Metallic Multilayers ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns ◽  
Interface Structures

AbstractWe investigated the differences in the interface structures and magnetotransport properties between surfactant-mediated multilayers and normal ones. From the observations of RHEED and High-Resolution X-ray diffraction patterns, we confirmed that the surfaces of Fe/Cr(100) multilayers with Pb are flatter and the interfaces are sharper than one without Pb, which means that Pb operates as an effective surfactant. The magnetoresistance(MR) ratio of the multilayers prepared with Pb was larger than that of the multilayers prepared without Pb. The change of resistance with magnetic field was larger for the multilayers with a surfactant.

scholarly journals The Australian High Resolution Neutron Powder Diffractometer

1983 ◽  
Vol 36 (4) ◽  
pp. 507 ◽  
Author(s):  
CJ Howard ◽  
CJ Ball ◽  
RL Davis ◽  
MM Elcombe
Keyword(s):  
High Resolution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powder Diffractometer ◽  
Neutron Powder Diffractometer ◽  
Good Agreement

The high resolution neutron powder diffractometer installed on the AAEC HIFAR reactor at Lucas Heights is described. The resolution is in good agreement with predictions and, although below the most optimistic estimates, the intensities are usable. Examples are given of problems solved using the diffractometer which could not have been solved either by X-ray diffraction or by use of a conventional neutron powder diffractometer. Plans for diffractometer development are outlined.

scholarly journals The AC Multi-Harmonic Magnetic Susceptibility Measurement Setup at the LNF-INFN

2014 ◽  
Vol 568-570 ◽  
pp. 82-89 ◽  
Author(s):  
Sheng Hao Wang ◽  
Augusto Marcelli ◽  
Daniele Di Gioacchino ◽  
Zi Yu Wu
Keyword(s):  
Magnetic Field ◽  
Magnetic Susceptibility ◽  
Materials Science ◽  
Superconducting Magnet ◽  
Magnetic Response ◽  
Ac Magnetic Susceptibility ◽  
Frequency Range ◽  
Control Data ◽  
Dc Magnetic Field ◽  
User Friendly

The AC magnetic susceptibility is a fundamental method in materials science, which allows to probe the dynamic magnetic response of magnetic materials and superconductors. The LAMPS laboratory at the Laboratori Nazionali di Frascati of the INFN hosts an AC multi-harmonic magnetometer that allows performing experiments with an AC magnetic field ranging from 0.1 to 20 Gauss and in the frequency range from 17 to 2070 Hz. A DC magnetic field from 0 to 8 T produced by a superconducting magnet can be applied, while data may be collected in the temperature range 4.2-300 K using a liquid He cryostat under different temperature cycles setups. The first seven AC magnetic multi-harmonic susceptibility components can be measured with a magnetic sensitivity of 1x10-6 emu and a temperature precision of 0.01 K. Here we will describe in detail about schematic of the magnetometer, special attention will be dedicated to the instruments control, data acquisition framework and the user-friendly LabVIEW-based software platform.

Station 16.3: a High-Resolution Single-Crystal Diffraction Facility at the SRS, Daresbury

1998 ◽  
Vol 5 (5) ◽  
pp. 1263-1269 ◽  
Author(s):  
S. P. Collins ◽  
R. J. Cernik ◽  
B. Fell ◽  
C. C. Tang ◽  
N. W. Harris ◽  
...  
Keyword(s):  
High Resolution ◽  
Single Crystal ◽  
Materials Science ◽  
Polarization State ◽  
High Energy ◽  
First Year ◽  
X Ray Diffraction ◽  
Optical Components ◽  
Wide Range ◽  
User Facility

SRS station 16.3 is now a fully scheduled user facility for high-resolution and high-energy single-crystal X-ray diffraction. It is based on a large three-axis diffractometer, designed and constructed at Daresbury for a wide range of physics and materials science applications. Served by wiggler 16 (a 6 T superconducting wavelength-shifter), the station has access to a broad spectrum of photon energies, extending to over 50 keV, and is designed for simple polarization-state tuning by motorized height adjustment of all optical components. This paper outlines the key design features and some of the science projects carried out during the first year of operation.

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