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The ab initio full-potential linearized augmented plane-wave method explicitly designed for the slab geometry was employed to elucidate the physical origin of the layer potentials for the trilayers nFe/3Cr/nFe(001), where n is the number of…

材料科学 · 物理学 2007-05-23 M. Pereiro , D. Baldomir , S. V. Man'kovsky , K. Warda , J. E. Arias , L. Wojtczak , J. Botana

It is shown, that the monotonic part of interlayer electronic conductivity strongly decreases in high magnetic field perpendicular to the conducting layers. We consider only the coherent interlayer tunnelling, and the obtained result…

介观与纳米尺度物理 · 物理学 2011-11-11 P. D. Grigoriev

The magnetoresistance (MR) associated with domain boundaries has been investigated in microfabricated bcc Fe (0.65 to 20 $\mu$m linewidth) wires with controlled stripe domains. Domain configurations have been characterized using magnetic…

介观与纳米尺度物理 · 物理学 2009-10-31 A. D. Kent , U. Ruediger , J. Yu , S. Zhang , P. M. Levy , Y. Zhong , S. S. P. Parkin

Ion-beam sputtering has been used to prepare Fe/Si multilayers on a variety of substrates and over a wide range of temperatures. Small-angle x-ray diffraction and transmission electron microscopy experiments show that the layers are heavily…

凝聚态物理 · 物理学 2009-10-28 A. Chaiken , R. P. Michel , M. A. Wall

We establish theoretically that in nonmagnetic semiconducting bilayer or multilayer thin film systems rolled up into compact quasi-one-dimensional nanoarchitectures, the ballistic magnetoresistance is very anisotropic: conductances depend…

介观与纳米尺度物理 · 物理学 2014-12-10 Ching-Hao Chang , Jeroen van den Brink , Carmine Ortix

We study the magnon bands of twisted bilayer honeycomb quantum magnets using linear spin wave theory. Although the interlayer coupling can be ferromagnetic or antiferromagnetic, we keep the intralayer one ferromagnetic to avoid possible…

强关联电子 · 物理学 2021-08-11 Xingchuan Zhu , Huaiming Guo , Shiping Feng

We have observed a superparamagnetic to ferromagnetic transition in films of isolated Ni grains covered by non-magnetic overlayers. The magnetoresistance (MR) of the films was measured as a function of the overlayer thickness. Initially,…

介观与纳米尺度物理 · 物理学 2009-10-31 A. Frydman , R. C. Dynes

We investigate the magnetization dynamics through the magnetoimpedance effect in ferromagnetic NiFe/Cu/Co films. We observe that the magnetoimpedance response is dependent on the thickness of the non-magnetic Cu spacer material, a fact…

材料科学 · 物理学 2015-06-22 E. F. Silva , M. Gamino , A. M. H. de Andrade , M. A. Corrêa , M. Vázquez , F. Bohn

In order to better understand the role of possible couplings in determining the giant magnetoresistance (GMR) behavior of multilayers, a knowledge of the dependence of the $GMR$ on magnetic field $H$ appears to be useful. Since a few…

材料科学 · 物理学 2015-11-30 Krisztián Szász , Imre Bakonyi

The FMR linewidth and its anisotropy in F$_1$/f/F$_2$/AF multilayers, where spacer f has a low Curie point compared to the strongly ferromagnetic F$_1$ and F$_2$, is investigated. The role of the interlayer exchange coupling in…

介观与纳米尺度物理 · 物理学 2016-08-31 A. F. Kravets , D. M. Polishchuk , Yu. I. Dzhezherya , A. I. Tovstolytkin , V. O. Golub , V. Korenivski

The magnetoresistance (MR) of a material is typically insensitive to reversing the applied field direction and varies quadratically with magnetic field in the low-field limit. Quantum effects [1], unusual topological band structures [2],…

We report the large linear magnetoresistance ($\sim 300\%$ in 9 T field at 2 K) and magnetothermopower in layered SrZnSb$_2$ crystal with quasi-two-dimensional Sb layers. A crossover from the semiclassical parabolic field dependent…

介观与纳米尺度物理 · 物理学 2016-04-18 Kefeng Wang , C. Petrovic

In ferromagnetic oxide epitaxial multilayers, magnetic properties and interlayer coupling are determined by a variety of factors. Beyond the contribution of interlayer exchange coupling, strain and interfacial effects, such as structural…

We determine the range of thicknesses and refractive indices for which omnidirectional reflection from quasiperiodic multilayers occurs. By resorting to the notion of area under the transmittance curve, we assess in a systematic way the…

光学 · 物理学 2009-11-11 A. G. Barriuso , J. J. Monzon , L. L. Sanchez-Soto , A. Felipe

This work explores the static and dynamic magnetic properties of weakly antiferromagnetically coupled Fe/Ti superlattices, emphasizing the link between magnetic behavior and structural characteristics. HRTEM and XRD analyses confirm…

The periodic response of magnetoresistance to an externally tunable parameter, such as magnetic field or chemical composition, in the bulk or an artificially designed material has been exploited for technological applications as well as to…

材料科学 · 物理学 2012-09-04 S. Dickert , D. K. Singh , R. Thantirige , M. T. Tuominen

We report on the structural and magnetic properties of single and double atomic layers of Mn on a clean and unreconstructed Nb(110) substrate. Low-temperature scanning tunneling spectroscopy measurements reveal a proximity-induced…

To characterize the possible magnetic structures created on magnetic multilayers a model has been formulated and studied. The interlayer inhomogeneous structures found indicate either (i) a regular periodic, (ii) a quasiperiodic change in…

材料科学 · 物理学 2009-10-31 F. V. Kusmartsev , H. S. Dhillon , M. D. Crapper

A rich variety of specific multidomain textures recently observed in antiferromagnetically coupled multilayers with perpendicular anisotropy include regular (equilibrium) multidomain states as well as different types of topological magnetic…

介观与纳米尺度物理 · 物理学 2009-11-13 N. S. Kiselev , U. K. Roessler , A. N. Bogdanov , O. Hellwig

The magnetic properties of Fe/Ag granular multilayers were examined by SQUID magnetization and Mossbauer spectroscopy measurements. Very thin (0.2 nm) discontinuous Fe layers show superparamagnetic properties that can be tailored by the…