Spin Polarized Inverse Photoemission Study of Fe and Co Thin Films on W(001)

1989 ◽  
Vol 151 ◽  
Author(s):  
Qing Cai ◽  
Recep Avci ◽  
Gerald J. Lapeyre
Keyword(s):  
Thin Films ◽  
Magnetic Thin Films ◽  
Radiative Transition ◽  
Square Lattice ◽  
Inverse Photoemission ◽  
Magnetic Remanence ◽  
Spin Polarized ◽  
Photoemission Study ◽  
Inverse Photoemission Spectroscopy

ABSTRACTSpin- (and angle-) resolved inverse photoemission spectroscopy (SPIPES) has beenused for studying magnetic thin films. The spin dependence of the unoccupiedelectronic structure has been investigated for in-situ-grown epitaxial, ultrathin Fe and Cofilms on W(001). The Fe overlayers have a square lattice and exhibit in-plane magneticremanence in the direction of the surface Brilluoin zone. Four or more atomic layersof Fe show bulklike SPIPES spectra with a majority spin peak at the Fermi energy (EF)and a broad minority peak 1.3 eV above EF The Co overlayers on W(001) showdistorted hexagonal structures in the plane with an atomic density twice that of theW(001) plane. Two atomic layers of Co show strong in-plane magnetic remanence withthe minority peak at 0.7 eV. The SPIPES results in general are consistent with thetheoretical electronic structure for momentum-conserving radiative transition from freeelectron-like bands down to the unoccupied 3d bands.

scholarly journals In situ angle-resolved photoemission study of MBE-grown (La,Ce)2CuO4 thin films

2004 ◽  
Vol 412-414 ◽  
pp. 134-138 ◽  
Author(s):  
H. Yamamoto ◽  
M. Naito ◽  
A. Tsukada ◽  
S. Suzuki
Keyword(s):  
Thin Films ◽  
Photoemission Study

In situ fabrication of Co90Nb10 soft magnetic thin films with adjustable resonance frequency from 1.3to4.9GHz

2008 ◽  
Vol 92 (22) ◽  
pp. 222505 ◽  
Author(s):  
Xiaolong Fan ◽  
Desheng Xue ◽  
Min Lin ◽  
Zhengmei Zhang ◽  
Dangwei Guo ◽  
...  
Keyword(s):  
Thin Films ◽  
Resonance Frequency ◽  
Magnetic Thin Films ◽  
Soft Magnetic ◽  
In Situ Fabrication

In situ angle-resolved photoemission study on La1−xSrxMnO3 thin films grown by laser MBE

2005 ◽  
Vol 144-147 ◽  
pp. 511-514 ◽  
Author(s):  
A. Chikamatsu ◽  
H. Wadati ◽  
M. Takizawa ◽  
R. Hashimoto ◽  
H. Kumigashira ◽  
...  
Keyword(s):  
Thin Films ◽  
Laser Mbe ◽  
Photoemission Study

In situ photoemission study of epitaxial thin films

2007 ◽  
Vol 310 (2) ◽  
pp. 963-965 ◽  
Author(s):  
H. Wadati ◽  
A. Maniwa ◽  
I. Ohkubo ◽  
H. Kumigashira ◽  
A. Fujimori ◽  
...  
Keyword(s):  
Thin Films ◽  
Epitaxial Thin Films ◽  
Photoemission Study

In situ angle-resolved photoemission study of half-metallic thin films

2007 ◽  
Vol 310 (2) ◽  
pp. 1030-1032
Author(s):  
A. Chikamatsu ◽  
H. Wadati ◽  
H. Kumigashira ◽  
M. Oshima ◽  
A. Fujimori ◽  
...  
Keyword(s):  
Thin Films ◽  
Metallic Thin Films ◽  
Half Metallic ◽  
Photoemission Study

Use of Magneto-Optic Kerr Effect Measurements to Study Strain and Misfit Accommodation in Thin Films of Ni/Cu (100)

1993 ◽  
Vol 308 ◽  
Author(s):  
H.E. Inglefield ◽  
C.A. Ballentine ◽  
G. Bochi ◽  
S.S. Bogomolov ◽  
R.C. O'Handley ◽  
...  
Keyword(s):  
Thin Films ◽  
Kerr Effect ◽  
Molecular Beam ◽  
Magnetic Thin Films ◽  
Fringe Analysis ◽  
High Resolution Tem ◽  
Kinetics Of ◽  
Misfit Accommodation ◽  
Magneto Optic

ABSTRACTWe have detected magnetic transitions in Ni/Cu (100) films as a function of Ni thickness through in situ measurements of the magneto-optic Kerr effect (MOKE). Crystalline quality was monitored using in situ RHEED and Auger electron spectroscopy. Films were deposited by molecular beam epitaxy on silicon wafers and cleaved sodium chloride with varying epitaxial Ni layer thicknesses between 10 and 200 A. High-resolution TEM images of these films indicate decreasing misfit dislocation spacing and decreasing strain as measured by moiré fringe analysis with increasing Ni thickness. These observations have been correlated with changes in magnetic anisotropy as measured by MOKE. MOKE, therefore, may provide a tool for in situ monitoring of the kinetics of misfit accommodation in magnetic thin films.

In Situ Characterization of the Pulsed Laser DepositIon of Magnetic Thin Films

1991 ◽  
Vol 236 ◽  
Author(s):  
A.J. Paul ◽  
D.W. Bonnell ◽  
J.W. Hastie ◽  
P.K. Schenck ◽  
R.D. Shull ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Effective Means ◽  
Pulsed Laser ◽  
Optical Emission ◽  
Magnetic Thin Films ◽  
Laser Deposition ◽  
Spectroscopic Techniques

AbstractPulsed Laser Deposition (PLD) has been proven as an effective means of depositing films from refractory targets. In our earlier work, either Nd/YAG or excimer lasers, interacting directly with target surfaces, were used to deposit thin films of high Tc superconductors, high dielectric constant BaTiO3 and ferroelectric PbZr0.53Ti0.47O3 (PZT). Time-resolved molecular beam mass spectrometry and optical emission spectroscopic techniques have been developed to characterize the vapor plumes responsible for film formation. More recently, this work has been extended to the PLD of magnetic thin films of Ag- Fe3O4 nanocomposites using excimer (ArF*, 193 nm) laser excitation. Optical emission spectra of the excited vapor phase species, formed during the plume generation and material deposition process, indicate that physically compressed powdered metal targets have inadequate homogeneity for film production, compared to targets that are chemically produced. An in situ Laser-induced Vaporization Mass Spectrometry (LVMS) technique utilizing a Nd/YAG (1064 nm) laser has been used to determine Time of-Arrival (TOA) profiles of the atomic, molecular, and ionic species produced in the plumes of Ag-Fe3O4. The neutral species TOA profiles indicate velocity distributions that are multimodal and not Maxwellian. These observations are in contrast to the TOA profiles observed from one-component targets (Ag or Fe3O4), where a single Maxwellian velocity distribution is found. Mössbauer effect measurements of the thin films have been made for correlation with the gas phase studies.

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