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.

Structural and Electrical Properties of Ni/Co Superlattices Using Pb as a Surfactant

1996 ◽  
Vol 440 ◽  
Author(s):  
M. Iwanami ◽  
R. Furukawa ◽  
T. Matsumoto ◽  
M. Kamiko ◽  
R. Yamamoto
Keyword(s):  
Magnetic Field ◽  
Electrical Properties ◽  
Molecular Beam ◽  
Interface Structure ◽  
Metallic Multilayers ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural And Electrical Properties ◽  
Diffraction Patterns ◽  
Initial Change

AbstractTo obtain informations about the correlation between structure and electrical property in metallic multilayers, we have fabricated Ni/Co superlattices with and without Pb as a surfactant by molecular beam epitaxy. From the observations of RHEED and x-ray diffraction patterns, we confirmed that the surfaces of Ni/Co superlattices with Pb are flatter and the interfaces are sharper than one without Pb, which means that Pb operates as an effective surfactant.We have investigated the electrical properties of superlattices by measuring magnetoresistance. The initial change of resistance with magnetic field from 0 to 1 kOe was larger for the superlattices with a surfactant, while once magnetic field was applied, the effect of a surfactant to resistivity change was not observed. This suggests that Pb also changes the initial magenetic domain structure and the magnetotransport property of Ni/Co superlattice is not sensitive to interface structure.

scholarly journals High-speed classification of coherent X-ray diffraction patterns on the K computer for high-resolution single biomolecule imaging

2013 ◽  
Vol 20 (6) ◽  
pp. 899-904 ◽  
Author(s):  
Atsushi Tokuhisa ◽  
Junya Arai ◽  
Yasumasa Joti ◽  
Yoshiyuki Ohno ◽  
Toyohisa Kameyama ◽  
...  
Keyword(s):  
High Resolution ◽  
High Speed ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns ◽  
Resolution Single

The Mixed Magnetic Property of Co0.76Cu0.74[Fe(CN)6]·7.5H2O

2018 ◽  
Vol 71 (11) ◽  
pp. 914
Author(s):  
Yanfang Xia ◽  
Min Liu ◽  
Duxin Li
Keyword(s):  
Magnetic Field ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Lattice Parameter ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns ◽  
Co Precipitation ◽  
The Magnetic Field

Co0.76Cu0.74[Fe(CN)6]·7.5H2O was prepared as a powder by a chemical co-precipitation method. The powder X-ray diffraction patterns were indexed to the typical face-centred cubic structure with the lattice parameter a 10.55(2) Å. The temperature dependence of the χ−1 curve obeys the Curie–Weiss law (χ = C/(T – θ)) in the temperature range of 180–300 K. According to Curie–Weiss law, the calculated θ value is −54.82 K. In the paramagnetic state at 300 K, the effective magnetic moment (μeff = (8χT)1/2) is 3.58 μB per formula unit. The calculated theoretical effective magnetic moment is 4.06 μB. The magnetic field cooling measurements under a 200 Oe applied magnetic field show that the saturation magnetization value at 2 K of the complex Co0.76Cu0.74[Fe(CN)6]·7.5H2O is 1.528 emu g−1.

Growth and Magnetic Properties of La0.65Pb0.35MnO3 Films

1999 ◽  
Vol 602 ◽  
Author(s):  
Q. L. Xu ◽  
M. T. Liu ◽  
Y. Liu ◽  
C. N. Borca ◽  
H. Dulli ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Defect Density ◽  
Rf Magnetron Sputtering ◽  
Scanning Tunneling ◽  
X Ray Diffraction ◽  
Tunneling Microscopy ◽  
X Ray ◽  
Bulk Magnetization ◽  
Low Energy Electron ◽  
Diffraction Patterns

AbstractWe have successfully grown La0.65PbO.35MnO3 thin films by a RF magnetron sputtering method onto (100) LaAlO3 single crystal substrates. X-ray diffraction measurements are consistent with a (100) cubic orientation of the films. The fourfold symmetry showed by LEED(Low Energy Electron Diffraction) patterns indicate that the films have surface order. STM(Scanning Tunneling Microscopy) measurements indicate that the surface of the films were smooth, with approximate 5 nm roughness. XPS (X-ray Photoemission Spectroscopy) shows that the surface defect density in the films is comparatively low. The bulk magnetization of the films at 6K in 1 T magnetic field reached 77 emu/g and a Curie temperature near 354 K, close to maximum resistivity. A negative magnetoresistance of 47% was observed at 320K in 5.5 T magnetic field.

Magnetostriction and Hysteresis of Tbdyhofe1.95 Alloys

2012 ◽  
Vol 529 ◽  
pp. 590-593
Author(s):  
Hong Bo Zhang ◽  
Fu Gang Shen ◽  
Tao Yang
Keyword(s):  
Magnetic Field ◽  
Crystal Structure ◽  
Magnetocrystalline Anisotropy ◽  
Anisotropy Constant ◽  
Spin Reorientation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns ◽  
Curie Temperatures ◽  
Curie Temperature Tc

The crystal structure, Curie temperatures, spin reorientation temperature, magnetocrystalline anisotropy constant and magnetostriction of TbDyHoFe1.95 alloys with composition formulation (1-y)Tb0.36Dy0.64Fe1.95+yTb0.20Dy0.22Ho0.58Fe1.95 (0≤y≤1) were investigated. X-ray diffraction patterns demonstrate the TbDyHoFe1.95 alloys possess MgCu2-type cubic Laves structure. The Curie temperature Tc decreases slightly from 381 °C for Tb0.36Dy0.64Fe2 to 379 °C for y=0.3, 375°C for y=0.4 and 373°C for y=0.5. The spin reorientation temperature Tr increases from -94 oC for Tb0.36Dy0.64Fe2 to -70°C for y=0.3 and -51oC for y=0.5. The magnetocrystalline anisotropy constant K1 decreases with increasing y value. The magnetostriction was examined under applied magnetic field H (0

Change Of SI(111) Surface Reconstruction Under Noble Metal Films

1991 ◽  
Vol 237 ◽  
Author(s):  
Hawoong Hong ◽  
Richard Aburano ◽  
D.-S. Lin ◽  
T.-C. Chiang ◽  
Haydn Chen ◽  
...  
Keyword(s):  
Noble Metal ◽  
Room Temperature ◽  
Grazing Angle ◽  
Interface Structure ◽  
Metal Films ◽  
X Ray Diffraction ◽  
X Ray ◽  
Au Film ◽  
Metal Overlayers ◽  
Interface Structures

ABSTRACTInterface structures between Si(111) and thick noble metal overlayers are studied by grazing-angle-incidence x-ray diffraction and crystal truncation rods. The 7×7 reconstruction is only preserved under a Ag film deposited at room temperature. This capped 7×7 structure changed to a 1×1 structure upon annealing over 250°C. A thick overlayer of room temperature deposited Au film destroyed the 7×7 reconstruction and changed the interface structure to 1×1. Our results are compared to a thick Cu/Si(111) interface structure1.

THE EFFECT OF FILM THICKNESS ON THE MICROSTRUCTURE OF La0.5Ca0.5MnO3 FILMS

2002 ◽  
Vol 16 (23) ◽  
pp. 3439-3447 ◽  
Author(s):  
X. M. CHEN ◽  
Y. WANG ◽  
C. X. LIU ◽  
Y. N. ZHAO ◽  
Z. H. MAI ◽  
...  
Keyword(s):  
Thin Films ◽  
Surface Roughness ◽  
High Resolution ◽  
Critical Thickness ◽  
Interface Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Surface And Interface ◽  
Atomic Force ◽  
Different Thickness

La 0.5 Ca 0.5 MnO 3 (LCMO) thin films grown on SrTiO 3 substrate with different thickness were investigated using high resolution X-ray diffraction, small angle reflectivity, and atomic force microscope (AFM). All the films are demonstrated to be c-axis oriented. The surface and interface structure of the films were obtained. It was found that the surface morphology of the films strongly depends on the thickness, and the film will crack when the thickness of the film reach a critical thickness. The surface roughness of the films increases with the thickness. The interface between the films and the substrates are very clear. There exists a non-designed cap layer on the surface of the LCMO layer.

The Formation of New Periodicities after N-Implantation in 4H- and 6H-SiC Samples

2013 ◽  
Vol 740-742 ◽  
pp. 447-450
Author(s):  
Konstantinos Zekentes ◽  
Katerina Tsagaraki ◽  
Aikaterini Breza ◽  
Nikolaos Frangis
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Periodic Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Nitrogen Ions ◽  
Diffraction Patterns ◽  
Post Implantation

The purpose of the present study is to study the crystal periodicities that appear in 4H- and 6H-SiC material after the implantation with nitrogen and prior to post-implantation annealing. High Resolution X-Ray diffraction (HRXRD) and Transmission Electron Microscopy (TEM) have been employed towards this purpose. Extra peaks at smaller, than the main (00n) peak, diffraction angles in HRXRD scans and extra spots in the electron diffraction patterns have been observed due to the presence of these periodicities. Higher lattice constant periodic structures are apparently formed from the implanted nitrogen ions located at interstitial sites and disappear after the annealing and the resulting positioning of nitrogen atoms in substitutional sites.

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