Experimental observation of the interaction of propagating spin waves with Néel domain walls in a Landau domain structure

P. Pirro; T. Koyama; T. Brächer; T. Sebastian; B. Leven; B. Hillebrands

doi:10.1063/1.4922396

The effect of Dzyaloshinskii–Moriya interaction on direct and backward transition between magnetic states of Pt/Co/Ir/Co/Pr synthetic ferrimagnet

Image Journal of Advanced Materials and Technologies ◽

10.17277/jamt.2021.03.pp.167-178 ◽

2021 ◽

Vol 6 (3) ◽

pp. 167-178

Author(s):

Artem D. Talantsev ◽

Ekaterina I. Kunitsyna ◽

Roman B. Morgunov

Keyword(s):

Thin Layer ◽

Domain Structure ◽

Magnetization Reversal ◽

Domain Walls ◽

Ferromagnetic Layers ◽

Magneto Optical Kerr Effect ◽

Magnetic States ◽

Fluctuation Fields ◽

Moriya Interaction ◽

Effect Technique

In this paper, we present the study of domain structure accompanying interstate transitions in Pt/Co/Ir/Co/Pr synthetic ferrimagnet (SF) of 1.1 nm thick and 0.6 – 1.0 nm thin ferromagnetic Co layers. Variation in the thickness of the thin layer causes noticeable changes in the domain structure and mechanism of magnetization reversal revealed by MOKE (Magneto-Optical Kerr Effect) technique. Magnetization reversal includes coherent rotation of magnetization of the ferromagnetic layers, generation of magnetic nuclei, spreading of domain walls (DW), and development of areas similar with strip domains, dependently on thickness of the thin layer. Inequivalence of the direct and backward transitions between magnetic states of SF with parallel and antiparallel magnetizations was observed in sample with thin layer thicknesses 0.8 nm and 1.0 nm. Asymmetry of the transition between these states is expressed in difference fluctuation fields and shapes of reversal magnetization nucleus contributing to the correspondent forward and backward transitions. We proposed simple model based on asymmetry of Dzyaloshinskii–Moriya interaction. This model explains competition between nucleation and domain wall propagation due to increase/decrease of the DW energy dependently on direction of the spin rotation into the DW in respect to external field.

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Interaction between propagating spin waves and domain walls on a ferromagnetic nanowire

Physical Review B ◽

10.1103/physrevb.85.174428 ◽

2012 ◽

Vol 85 (17) ◽

Cited By ~ 46

Author(s):

J.-S. Kim ◽

M. Stärk ◽

M. Kläui ◽

J. Yoon ◽

C.-Y. You ◽

...

Keyword(s):

Domain Walls ◽

Spin Waves ◽

Ferromagnetic Nanowire

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Domain Diversity and Polarization Switching in Amino Acid β-Glycine

Materials ◽

10.3390/ma12081223 ◽

2019 ◽

Vol 12 (8) ◽

pp. 1223 ◽

Cited By ~ 2

Author(s):

Daria Vasileva ◽

Semen Vasilev ◽

Andrei L. Kholkin ◽

Vladimir Ya. Shur

Keyword(s):

Amino Acid ◽

Domain Structure ◽

Lead Zirconate Titanate ◽

Domain Walls ◽

Piezoelectric Materials ◽

Polarization Switching ◽

Building Blocks ◽

Crystallographic Structure ◽

Processing Temperature ◽

Sensors And Actuators

Piezoelectric materials based on lead zirconate titanate are widely used in sensors and actuators. However, their application is limited because of high processing temperature, brittleness, lack of conformal deposition and, more importantly, intrinsic incompatibility with biological environments. Recent studies on bioorganic piezoelectrics have demonstrated their potential in these applications, essentially due to using the same building blocks as those used by nature. In this work, we used piezoresponse force microscopy (PFM) to study the domain structures and polarization reversal in the smallest amino acid glycine, which recently attracted a lot of attention due to its strong shear piezoelectric activity. In this uniaxial ferroelectric, a diverse domain structure that includes both 180° and charged domain walls was observed, as well as domain wall kinks related to peculiar growth and crystallographic structure of this material. Local polarization switching was studied by applying a bias voltage to the PFM tip, and the possibility to control the resulting domain structure was demonstrated. This study has shown that the as-grown domain structure and changes in the electric field in glycine are qualitatively similar to those found in the uniaxial inorganic ferroelectrics.

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Observations of Domain Structure at Initial Growth Stage of PbTiO3 Thin Films Grown by Mocvd

MRS Proceedings ◽

10.1557/proc-596-321 ◽

1999 ◽

Vol 596 ◽

Cited By ~ 10

Author(s):

H. Fujisawa ◽

M. Shimizu ◽

H. Niu ◽

K. Honda ◽

S Ohtani

Keyword(s):

Thin Films ◽

Domain Structure ◽

Growth Stage ◽

Domain Walls ◽

Chemical Vapor ◽

Initial Growth ◽

Continuous Film ◽

Cross Sectional ◽

Initial Growth Stage ◽

Transmission Electron

AbstractDomain structure and growth mechanism of PbTiO3 thin films were investigated using a transmission electron microscopy(TEM) from the viewpoint of size effects. At initial growth stage of (111)-oriented PbTiO3 films prepared by metalorganic chemical vapor deposition(MOCVD), triangle-shaped islands were grown on Pt(111)/SiO2/Si before becoming a continuous film. Triangular islands grew gradually in a lateral dimension. This means that PbTiO3 films grew two-dimensionally at initial growth stage. In cross-sectional TEM photomicrographs, (101)-twin boundaries (90° domain walls) and inclination of {110} or {101}-plane were observed in PbTiO3 islands. This result indicates that such small PbTiO3 islands have a tetragonal structure and could have spontaneous polarization. The minimum island which had 90° domain walls was 10nm high and 18nm wide.

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Structure and Dynamics of Ferroelectric Domains in Polycrystalline Pb(Fe1/2Nb1/2)O3

Materials ◽

10.3390/ma12081327 ◽

2019 ◽

Vol 12 (8) ◽

pp. 1327 ◽

Cited By ~ 3

Author(s):

Ursic ◽

Bencan ◽

Prah ◽

Dragomir ◽

Malic

Keyword(s):

Domain Wall ◽

Ambient Temperature ◽

Domain Structure ◽

Domain Walls ◽

Domain Switching ◽

Piezoresponse Force Microscopy ◽

Paraelectric Phase Transition ◽

Force Microscopy ◽

Ferroelectric Domains

A complex domain structure with variations in the morphology is observed at ambient temperature in monoclinic Pb(Fe1/2Nb1/2)O3. Using electron microscopy and piezoresponse force microscopy, it is possible to reveal micrometre-sized wedge, lamellar-like, and irregularly shaped domains. By increasing the temperature, the domain structure persists up to 80 °C, and then starts to disappear at around 100 °C due to the proximity of the ferroelectric–paraelectric phase transition, in agreement with macroscopic dielectric measurements. In order to understand to what degree domain switching can occur in the ceramic, the mobility of the domain walls was studied at ambient temperature. The in situ poling experiment performed using piezoresponse force microscopy resulted in an almost perfectly poled area, providing evidence that all types of domains can be easily switched. By poling half an area with 20 V and the other half with −20 V, two domains separated by a straight domain wall were created, indicating that Pb(Fe1/2Nb1/2)O3 is a promising material for domain-wall engineering.

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Domain Structure Reversible Reconstruction of Amorphous Ferromagnetic by Water Molecules Weak Adsorption

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.152-153.428 ◽

2009 ◽

Vol 152-153 ◽

pp. 428-430 ◽

Cited By ~ 1

Author(s):

V.E. Zubov ◽

A.D. Kudakov ◽

N.L. Levshin ◽

N.A. Mezenkov

Keyword(s):

Domain Wall ◽

Domain Structure ◽

Domain Walls ◽

Sample Surface ◽

Wall Structure ◽

Water Molecules ◽

Wall Width ◽

Influence Of Water ◽

Weak Adsorption ◽

Domain Wall Structure

Influence of water molecules reversible adsorption on domain structure and domain wall structure in amorphous Fe-rich ferromagnet samples is investigated by magnetooptical method. Before investigation the samples were kept in the air. Domain structure of the samples significantly changes in wacuum: instead one 180-degree domain wall several domain walls appear which are oriented with angle 45o to the long side of the sample. This effect is completely reversible. Another new effect is found: domain wall width on the sample surface in vacuum is 35% bigger (13.5 µm) than in atmosphere of water vapor (10 µm).

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