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We investigate spin dynamics in nanodisc arrays of synthetic-antiferromagnets (SAF) made of Py/NiCu/Py trilayers, where the NiCu spacer undergoes a Curie transition at about 200 K. The observed ferromagnetic resonance spectra have three…

Mesoscale and Nanoscale Physics · Physics 2024-06-19 V. Yu. Borynskyi , D. M. Polishchuk , A. K. Melnyk , A. F. Kravets , A. I. Tovstolytkin , V. Korenivski

We present a numerical approach to simulate the Ferromagnetic Resonance (FMR) of micron and nanosized magnetic elements by a micromagnetic finite difference method. In addition to a static magnetic field a linearly polarized oscillating…

Computational Physics · Physics 2016-10-31 K. Wagner , S. Stienen , M. Farle

Magneto-structural phase transition in FeRh epitaxial layers was studied optically. It is shown that the transition between the low-temperature antiferromagnetic phase and the high-temperature ferromagnetic phase is accompanied by a rather…

Materials Science · Physics 2016-08-31 V. Saidl , M. Brajer , L. Horak , H. Reichlova , K. Vyborny , M. Veis , T. Janda , F. Trojanek , I. Fina , X. Marti , T. Jungwirth , P. Nemec

Magnetic insulators are often antiferromagnetic (AFM) and layered AFM compounds usually show low ordering temperature. On the other hand, layered ferromagnetic (FM) insulators with high-TC are very rare although they could be quite useful…

Materials Science · Physics 2018-11-12 Ke Yang , Feng-Ren Fan , Alessandro Stroppa , Hua Wu

The magneto-phonon resonance or MPR occurs in semiconductor materials when the energy spacing between Landau levels is continuously tuned to cross the energy of an optical phonon mode. MPRs have been largely explored in bulk semiconductors,…

Materials Science · Physics 2015-06-04 Sarah Goler , Jun Yan , Vittorio Pellegrini , Aron Pinczuk

The present paper theoretically investigates magnetoresistance curves in quasiperiodic magnetic multilayers for two different growth directions, namely [110] and [100]. We considered identical ferromagnetic layers separated by non-magnetic…

Mesoscale and Nanoscale Physics · Physics 2015-06-04 L. D. Machado , C. G. Bezerra , M. A. Correa , C. Chesman , J. E. Pearson , A. Hoffmann

The magnetic properties of Nd${}_2$Fe${}_{14}$B (NFB)/transition metal (TM = Fe, Co) multilayer systems are studied on the basis of first-principles density functional calculations. We optimize the model structure under a variety of…

Mesoscale and Nanoscale Physics · Physics 2016-01-13 Nobuyuki Umetsu , Yuta Toga , Akimassa Sakuma

We present Magnetic Resonance Force Microscopy (MRFM) measurements of Ferromagnetic Resonance (FMR) in a 50 nm thick permalloy film, tilted with respect to the direction of the external magnetic field. At small probe-sample distances the…

We report the first measurements of effects of large current densities on current-perpendicular-to-plane magnetoresistance (MR) of magnetic multilayers containing two antiferromagnetic layers separated by a non-magnetic layer. These…

Materials Science · Physics 2008-10-24 Z. Wei , A. Sharma , J. Bass , M. Tsoi

Being nonlinear dynamic systems, magnetic read sensors should respond to an excitation signal of a frequency considerably different from their natural ferromagnetic resonance (FMR) frequencies. Because of the magnetization dynamics'…

We show that periodic magnetic nanostructures (magnonic crystals) represent an ideal system for studying excitations on disordered periodical lattices because of the possibility of controlled variation of the degree of disorder by varying…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 J. Ding , M. Kostylev , A. O. Adeyeye

The oscillation periods of the interlayer exchange coupling are investigated when two magnetic layers are separated by a metallic superlattice of two distinct non-magnetic materials. In spite of the conventional behaviour of the coupling as…

Condensed Matter · Physics 2009-10-30 M. S. Ferreira

The frequency dependence of the interlayer conductivity of a layered Fermi liquid in a magnetic field which is tilted away from the normal to the layers is considered. For both quasi-one- and quasi-two-dimensional systems resonances occur…

Strongly Correlated Electrons · Physics 2009-10-31 Ross H. McKenzie , Perez Moses

This work is devoted to experimental study of influence of superconductivity (S) on ferromagnetism (FM) (inverse proximity effects) with the help of Polarized Neutron Reflectivity. Combining meausurements of specular and diffuse intensities…

Superconductivity · Physics 2008-01-28 Yu. N. Khaidukov , Yu. V. Nikitenko , V. L. Aksenov

Dynamic properties of NiFe thin films on PMN-PT piezoelectric substrate are investigated using the spin-diode method. Ferromagnetic resonance (FMR) spectra of microstrips with varying width are measured as a function of magnetic field and…

Chemically ordered B2 FeRh exhibits a remarkable antiferromagnetic-ferromagnetic phase transition that is first order. It thus shows phase coexistence, usually by proceeding though nucleation at random defect sites followed by propagation…

A method for measuring the degree of spin polarization of magnetic materials based on spin-dependent resonant tunneling is proposed. The device we consider is a ballistic double-barrier resonant structure consisting of a ferromagnetic layer…

Mesoscale and Nanoscale Physics · Physics 2008-07-12 Francesco Giazotto , Fabio Taddei , Rosario Fazio , Fabio Beltram

Magnetic confinement fusion researches are an approach to demonstrate the feasibility of nuclear fusion power for energy production. In these experiments, mega-watt range power Radio-Frequency waves, from tens of MHz to hundreds of GHz, are…

Plasma Physics · Physics 2017-10-11 Julien Hillairet , Marc Goniche , Nicolas Fil , Mohamed Belhaj , Jérôme Puech

We present the results of a muon-spin relaxation (muSR) investigation into magnetic ordering in several families of layered quasi-two-dimensional molecular antiferromagnets based on transition metal ions such as S=1/2 Cu2+ bridged with…

The current status and prospects of research on ferromagnetism in semiconductors are reviewed. The question of the origin of ferromagnetism in europium chalcogenides, chromium spinels and, particularly, in diluted magnetic semiconductors is…

Materials Science · Physics 2009-11-07 Tomasz Dietl