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The theoretical description of the anomalous ferroelectric, ferromagnetic and magnetoelectric properties of Pb(Fe1/2Ta1/2)x(Zr0.53Ti0.47)1-xO3 and Pb(Fe1/2Nb1/2)x(Zr0.53Ti0.47)1-xO3 micro-ceramics is given. We performed calculations of…

材料科学 · 物理学 2016-02-17 Maya D. Glinchuk , Eugene A. Eliseev , Anna N. Morozovska

Magnetic two-dimensional (2D) semiconductors have attracted a lot of attention because modern preparation techniques are capable of providing single crystal films of these materials with precise control of thickness down to the single-layer…

We propose a short overview of a few selected issues of magnetism in reduced dimensions, which are the most relevant to set the background for more specialized contributions to the present Special Issue. Magnetic anisotropy in reduced…

其他凝聚态物理 · 物理学 2016-08-16 Olivier Fruchart , André Thiaville

Polarized Neutron Reflectometry and magnetometry measurements have been used to obtain a comprehensive picture of the magnetic structure of a series of La{2/3}Sr{1/3}MnO{3}/Pr{2/3}Ca{1/3}MnO{3} (LSMO/PCMO) superlattices, with varying…

强关联电子 · 物理学 2009-11-13 D. Niebieskikwiat , L. E. Hueso , J. A. Borchers , N. D. Mathur , M. B. Salamon

The giant magnetoresistance (GMR) of ferromagnetic bilayers with a superconducting contact (F1/F2/S) is calculated in ballistic and diffusive regimes. As in spin-valve, it is assumed that the magnetization in the two ferromagnetic layers F1…

材料科学 · 物理学 2009-10-31 N. Ryzhanova , C. Lacroix , A. Vedyayev , D. Bagrets , B. Dieny

We examine transport properties of a magnetic superlattice with current perpendicular to the planes. In the limit that the phase-breaking and spin flip scattering lengths are greater than the system size, a multiple-scattering approach is…

介观与纳米尺度物理 · 物理学 2007-05-23 R. Seviour , S. Sanvito , C. J. Lambert , J. H. Jefferson

We have carried out 63,65Cu NMR spectra measurements in magnetic field up to about 15.5 T on single crystal of a multiferroic triangular-lattice antiferromagnet CuCrO2. The measurements were performed for perpendicular and parallel…

强关联电子 · 物理学 2014-12-30 Yu. A. Sakhratov , L. E. Svistov , P. L. Kuhns , H. D. Zhou , A. P. Reyes

We investigate the magnetic properties of a Heisenberg ferrimagnetic multilayer by using Monte Carlo simulations. The aim of this work is to study the local structural anisotropy model which is a possible origin of the perpendicular…

材料科学 · 物理学 2009-11-11 Etienne Talbot , Pierre Emmanuel Berche , Denis Ledue , Renaud Patte

We have investigated the magnetoresistance of strongly asymmetric double-well structures formed by a thin AlGaAs barrier grown far from the interface in the GaAs buffer of standard heterostructures. In magnetic fields oriented parallel to…

介观与纳米尺度物理 · 物理学 2009-11-07 P. Svoboda , Y. Krupko , L. Smrcka , M. Cukr , T. Jungwirth , L. Jansen

We conduct an exploration of the energy landscape of two coupled ferromagnetic layers with perpendicular-to-plane uniaxial anisotropy using finite-element micromagnetic simulations. These multilayers can be used to produce noncollinearity…

介观与纳米尺度物理 · 物理学 2024-09-04 George Lertzman-Lepofsky , Afan Terko , Sabri Koraltan , Dieter Suess , Erol Girt , Claas Abert

Two-component conductors -- e.g., semi-metals and narrow band semiconductors -- often exhibit unusually strong magnetoresistance in a wide temperature range. Suppression of the Hall voltage near charge neutrality in such systems gives rise…

介观与纳米尺度物理 · 物理学 2017-10-03 P. S. Alekseev , A. P. Dmitriev , I. V. Gornyi , V. Yu. Kachorovskii , B. N. Narozhny , M. Schütt , M. Titov

We predict unidirectional magnetoresistance effects arising in a bilayer composed of a nonmagnetic metal and a ferromagnetic insulator, whereby both longitudinal and transverse resistances vary when the direction of the applied electric…

介观与纳米尺度物理 · 物理学 2025-03-10 M. Mehraeen , Pengtao Shen , Steven S. -L. Zhang

A novel phenomenological approach to the analysis of the conductivities of incoherent layered crystals is presented. It is based on the fundamental relationship between the resistive anisotropy $\sigma_{ab}/\sigma_c$ and the ratio of the…

强关联电子 · 物理学 2009-11-10 George A. Levin

Some physical properties of bcc Fe/V and Fe/Co (001) superlattices are reviewed. The dependence of the magnetic anisotropy on the in-plane strain introduced by the lattice mismatch between Fe and V is measured and compared to a theoretical…

材料科学 · 物理学 2009-11-07 P. Nordblad , A. Broddefalk , R. Mathieu , P. Blomqvist , O. Eriksson , R. Wäppling

For dielectric multilayered metamaterials, the effective-parameter representation is known to be insensitive to geometrical features occurring at deeply subwavelength scales. However, recent studies on periodic and aperiodically ordered…

光学 · 物理学 2020-08-26 Marino Coppolaro , Giuseppe Castaldi , Vincenzo Galdi

Recent measurements of the magnetoresistance (MR) of amorphous superconducting thin films in tilted magnetic fields have displayed several surprising experimental details, in particular a strong dependence of the MR on field angle at low…

超导电性 · 物理学 2015-07-22 Elkana Porat , Yigal Meir

A new proposal is given to achieve high degree of magnetoresistance (MR) in a magnetic quantum device where two magnetic layers are separated by a non-magnetic (NM) quasiperiodic layer that acts as a spacer. The NM spacer is chosen in the…

介观与纳米尺度物理 · 物理学 2019-06-14 Moumita Patra , Santanu K. Maiti , Shreekantha Sil

The interlayer coupling mediated by fermions in ferromagnets brings about parallel and anti-parallel magnetization orientations of two magnetic layers, resulting in the giant magnetoresistance, which forms the foundation in spintronics and…

We develop a general formalism for analyzing the ferromagnetic resonance characteristics of a magnetic dimer consisting of two magnetic elements (in a horizontal or vertical configuration) coupled by dipolar interaction, taking account of…

材料科学 · 物理学 2015-01-22 A. F. Franco , J. L. Déjardin , H. Kachkachi

Butterfly magnetoresistance (BMR) and antisymmetric magnetoresistance (ASMR) are about a butterfly-cross curve and a curve with one peak and one valley when a magnetic field is swept up and down along a fixed direction. Other than the…

介观与纳米尺度物理 · 物理学 2022-11-18 H. T. Wu , Tai Min , Z. X. Guo , X. R. Wang