Direct Measurement of the Absolute Orientation of N3 Dye at Gold and Titanium Dioxide Surfaces with Heterodyne-Detected Vibrational SFG Spectroscopy

2016 ◽  
Vol 120 (12) ◽  
pp. 6601-6611 ◽  
Author(s):  
Christopher C. Rich ◽  
Max A. Mattson ◽  
Amber T. Krummel
Keyword(s):  
Titanium Dioxide ◽  
Direct Measurement ◽  
Absolute Orientation ◽  
The Absolute

Direct measurement of the absolute value of the interaction force between the fiber probe and the sample in a scanning near-field optical microscope

2002 ◽  
Vol 81 (8) ◽  
pp. 1503-1505 ◽  
Author(s):  
D. A. Lapshin ◽  
V. S. Letokhov ◽  
G. T. Shubeita ◽  
S. K. Sekatskii ◽  
G. Dietler
Keyword(s):  
Direct Measurement ◽  
Near Field ◽  
Interaction Force ◽  
Optical Microscope ◽  
Fiber Probe ◽  
Absolute Value ◽  
The Absolute

The direct measurement of the magnetization entropy of a paramagnetic substance: thermal and magnetic properties of ferric methylammonium alum at low temperatures

1961 ◽  
Vol 262 (1308) ◽  
pp. 110-119 ◽  
Keyword(s):  
Magnetic Properties ◽  
Direct Measurement ◽  
Ground State ◽  
Low Temperatures ◽  
Experimental Error ◽  
Energy Levels ◽  
Ferric Ions ◽  
Crystalline Field ◽  
The Absolute ◽  
Paramagnetic Substance

A method, is described for determining the magnetization entropy of a paramagnetic sub­stance by the measurement of the heat absorbed by the sample during isothermal demagnet­izations near 1°K. The method has been used with ferric methylammonium alum, which deviates appreciably from ideal behaviour because of the large Stark splittings of the ground state of the Fe 3+ ions. The results were found to agree within the experimental error with magnetization entropies computed from the energy levels of the ferric ions in a trigonal crystalline field. The computed entropies have been used to determine the absolute tem­peratures below 1°K reached by adiabatic demagnetizations of this salt.

scholarly journals Constraining the absolute orientation of η Carinae’s binary orbit: a 3D dynamical model for the broad [Fe iii] emission★

2012 ◽  
Vol 420 (3) ◽  
pp. 2064-2086 ◽  
Author(s):  
T. I. Madura ◽  
T. R. Gull ◽  
S. P. Owocki ◽  
J. H. Groh ◽  
A. T. Okazaki ◽  
...  
Keyword(s):  
Dynamical Model ◽  
Absolute Orientation ◽  
The Absolute ◽  
Binary Orbit

scholarly journals Mapping domains in the weak ferromagnet CoCO3

2014 ◽  
Vol 70 (a1) ◽  
pp. C1356-C1356
Author(s):  
Guillaume Beutier ◽  
Steve Collins ◽  
Gareth Nisbet ◽  
Elena Ovchinnikova ◽  
Vladimir Dmitrienko
Keyword(s):  
Magnetic Moments ◽  
Electric Polarization ◽  
Magnetic Scattering ◽  
Zero Field ◽  
Dm Interaction ◽  
X Ray ◽  
Absolute Orientation ◽  
Weak Ferromagnet ◽  
The Absolute ◽  
Perpendicular Component

The Dzyaloshinskii-Moriya (DM) interaction [1,2] produces a perpendicular component in the coupling of neighbouring spins when the symmetry between the spins is low, or can drive a distortion of intervening atoms to create a spontaneous electric polarization in some magnetoelectrics. In weak ferromagnets, the canting of the atomic moments due to the DM interaction leads to a small parasitic ferromagnetic polarization in an otherwise antiferromagnetic structure. Recently, we determined the sign of the Dzyaloshinskii–Moriya interaction in the weak ferromagnet FeBO3 by measuring the interference between resonant x-ray scattering and non-resonant magnetic scattering at a forbidden reflection [3]. Using the same method, we determine its sign in the carbonates MnCO3 and CoCO3. These isostructural materials turn out to show opposite interference effect: further analysis is underway to confirm or not that they actually have Dzyaloshinskii–Moriya interactions of opposite signs. We go one step further and apply the same principle to map the absolute orientation (direction and sense) of the magnetisation in a crystal of CoCO3: by mapping the 009 forbidden reflection at 3 azimuthal angles, we obtain 3 projections of the local magnetisation allowing its unambiguous determination. The reconstructed magnetisation map, whose spacial resolution is about 20 µm x 20 µm (the size of the focused x-ray beam), was measured after zero-field cooling to 9 K, well below the Neel temperature. It confirms the strong in-plane anisotropy of the material, with magnetisation domains essentially along 6 orientations separated by 600. Two of them, with orientation at 600to each other (green and orange in the figure), are largely dominant on the part of the sample that was imaged. To our knowledge it is the first experimental determination of the absolute orientation of the magnetic moments in a weak ferromagnet. The figure shows the reconstructed map of magnetisation, with the direction of the local in-plane magnetisation encoded (in radians) on a periodic colour map.

scholarly journals Computationally Efficient Iterative Pose Estimation for Space Robot Based on Vision

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Xiang Wu ◽  
Ning Wu
Keyword(s):  
Pose Estimation ◽  
Error Function ◽  
Outer Space ◽  
Space Robot ◽  
Space Environment ◽  
Experimental Result ◽  
Computational Time ◽  
Computationally Efficient ◽  
Absolute Orientation ◽  
The Absolute

In postestimation problem for space robot, photogrammetry has been used to determine the relative pose between an object and a camera. The calculation of the projection from two-dimensional measured data to three-dimensional models is of utmost importance in this vision-based estimation however, this process is usually time consuming, especially in the outer space environment with limited performance of hardware. This paper proposes a computationally efficient iterative algorithm for pose estimation based on vision technology. In this method, an error function is designed to estimate the object-space collinearity error, and the error is minimized iteratively for rotation matrix based on the absolute orientation information. Experimental result shows that this approach achieves comparable accuracy with the SVD-based methods; however, the computational time has been greatly reduced due to the use of the absolute orientation method.

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