Calculations of Bulk and Surface Magnetic Polaritons in Modulated Antiferromagnetic / Non-Magnetic Superlattices

1993 ◽  
Vol 313 ◽  
Author(s):  
Fred Lacy ◽  
Ernest L. Carter ◽  
Steven L. Richardson
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Spin Waves ◽  
Theoretical Research ◽  
Relative Thickness ◽  
Magnetic Superlattices ◽  
Magnetic Spin ◽  
Magnetic Polaritons

ABSTRACTRecent advances in molecular beam epitaxy have renewed research on the physics of artificially structured magnetic superlattices. In particular, there has been much theoretical research on the propagation of magnetic spin waves or magnetic polaritons in magnetic superlattices.1 In this work, we have studied the effect of modulating both the period of an antiferromagnetic/non-Magnetic semi-infinite superlattice and the relative thickness of its individual layers to see how the dispersion relationships co (k) for bulk and surface magnetic polaritons are effected. We have also calculated the effect of an external magnetic field on (u (k) and our calculation goes beyond the magnetostatic approximation by taking retardation effects into account.

Effect of The Orientation of The Magnetic Field on The Giant Magnetoresistance of Fe/Cr Superlattices

1995 ◽  
Vol 384 ◽  
Author(s):  
V.V. Ustinov ◽  
V.I. Minin ◽  
L.N. Romashev ◽  
A.B. Semerikov ◽  
A.R. Del
Keyword(s):  
Magnetic Field ◽  
Molecular Beam Epitaxy ◽  
Field Strength ◽  
Magnetization Curve ◽  
Giant Magnetoresistance ◽  
Molecular Beam ◽  
Orientation Dependence ◽  
Arbitrary Orientation ◽  
Strength Dependence ◽  
The Magnetic Field

ABSTRACTWe study the magnetoresistance of [Fe/Cr]30/MgO superlattices grown by molecular beam epitaxy at a various magnetic field directions. The theory of the orientation dependence of the effect is developed. It is shown that the magnetic field strength dependence of magnetoresistance can be calculated for arbitrary orientation of magnetic field if this dependence is known for in-plane and perpendicular-to-plane magnetic fields. It is noted that the magnetization curve can be obtained by making use of the results of the magnetoresistance measurements.

Fabrication and Characteristic Investigation of Multifunctional Oxide p-n Heterojunctions

2006 ◽  
Vol 45 ◽  
pp. 2582-2587 ◽  
Author(s):  
Hui Bin Lu ◽  
K.J. Jin ◽  
Kun Zhao ◽  
Y.H. Huang ◽  
Meng He ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Molecular Beam Epitaxy ◽  
Ferroelectric Property ◽  
Molecular Beam ◽  
Theoretical Study ◽  
High Sensitivity ◽  
Photoelectric Effect ◽  
Perovskite Oxide ◽  
Electrical Devices ◽  
Low Magnetic Field

A series of all-perovskite oxide p-n heterojunctions (PNHs) as well as perovskite oxide and Si PNHs have been fabricated by a laser molecular-beam epitaxy. The good nonlinear and rectifying I-V characteristics in the PNHs, unusual and high sensitivity of positive magnetoresistance in low magnetic field in SrNbxTi1-xO3/La1-ySryMnO3 and La1-xSrxMnO3/Si PNHs, ps orders ultrafast photoelectric effect in La1-xSrxMnO3/Si PNHs, as well as ferroelectric property due to the interface enhancement in BaNb0.3Ti0.7O3/Si PNHs have been observed. It is expected that the further investigation on the PNHs could not only stimulate theoretical study on the mechanisms but also would open up new possibilities in the development and application of electrical devices.

Magnetic Polaritons on the Interface of Superconductor and Ferromagnet

2009 ◽  
Vol 152-153 ◽  
pp. 369-372 ◽  
Author(s):  
D.G. Sannikov ◽  
D.I. Sementsov ◽  
S.V. Zhirnov
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
External Magnetic Field ◽  
High Temperature Superconductor ◽  
Transverse Electric ◽  
Interface Structure ◽  
Dispersive Equation ◽  
Surface Polaritons ◽  
Magnetic Polaritons ◽  
Crystallographic Axes

In the present paper the dispersive equation for surface polaritons localized at the ferromagnet - high temperature superconductor interface structure have been obtained. The main characteristics dependences upon the external magnetic field are analyzed in the frame of the electromagnetic approach for transverse electric (TE) polarization wave. The analysis for different orientations of superconductor crystallographic axes relative to wave vector directions is carried out.

scholarly journals Spin Waves Excitations of Co/Pt Multilayers

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
W. Zhou
Keyword(s):  
Magnetic Field ◽  
Light Scattering ◽  
External Magnetic Field ◽  
Spin Waves ◽  
Perpendicular Magnetic Anisotropy ◽  
Interlayer Coupling ◽  
Thickness Change ◽  
Single Spin ◽  
Field Situation ◽  
Scattering Measurements

The present work investigated interlayer couplings of [Co(20 Å)/Pt(30 Å)]5, [Co(4 Å)/Pt(7 Å)]30, and [Co(4 Å)/Pt(9 Å)]30multilayers with strong perpendicular magnetic anisotropy (PMA). Brillouin light scattering measurements were utilized to obtain spin waves of these samples with in-plane external magnetic fields. Interlayer couplings were found to be very sensitive to Pt thickness change from 7 Å to 9 Å, which implies that Pt atoms were more difficult to be polarized to provide interlayer coupling between Co layers than in the perpendicular external magnetic field situation. When Pt layer is 30 Å, the observed single spin wave can confirm the disappearance of interlayer coupling even when Co layer thickness is 20 Å.

Spin configurations in strained magnetic superlattices grown by molecular beam epitaxy

2006 ◽  
Vol 32 (1-2) ◽  
pp. 379-382 ◽  
Author(s):  
R.T. Lechner ◽  
G. Springholz ◽  
T.U. Schülli ◽  
J. Stangl ◽  
T. Schwarzl ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Magnetic Superlattices
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