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antiferromagnet

arXiv:2105.04279v4 [cond-mat.stat-mech] 21 Jul 2022 MonteCarlo studyofthephasediagramoflayeredXY antiferromagnet Muktish Acharyya1,∗ and Erol Vatansever2 ...

Antiferromagnetic opto-spintronics

Control and detection of spin order in ferromagnetic materials is the main principle enabling magnetic information to be stored and read in current technologies. Antiferromagnetic materials, on ...

Difference diamagnetism and antiferromagnetism

Here you find a simple explanation. Key points: Diamagnetic substances are composed of atoms which have no net magnetic moments (ie., all the orbital shells are filled and there are no unpaired electrons).

Phys. Rev. B 101, 041402(R) (2020)

Recent experiments have proven that few-layer CrI${}_{3}$, a two-dimensional ferromagnetic insulator, orders antiferromagnetically between layers and shows very small critical fields, which allows for full electrical control of interlayer magnetism. Here, the authors propose a switching mechanism based on the formation of magnetic polarons, or ferrons. Electrons in …

Antiferromagnetism

where, in agreement with (8.1), one has for the sub-lattice α:R i = (2l)a and for the sub-lattice β:R i = (2l + 1)a (a is the lattice constant, which will be assumed later on to be 1, a = 1, l – integer number).Vector Q is the reciprocal lattice vector in the presence of the AF ground state. For pure (commensurate) antiferromagnetism this vector is Q = (π, π).

Ferroelectrics and Antiferroelectrics

The ferroelectric effect was discovered in 1920 by Valasek, who obtained hysteresis curves for Rochelle salt analogous to the B–H curves of ferromagnetism [], and studied the electric hysteresis and piezoelectric response of the crystal in some detail [].For about 15 years thereafter, ferroelectricity was considered as a very specific property of Rochelle salt, until Busch and …

Triangular antiferromagnets

Review/Synthèse 607 Fig. 2. Crystal structure of (@)ABX and (K)BX2 compounds. A is an alkali metal, B is a transition metal, andXisahalogenatom. in different planes.

Antiferroelectricity in oxides: a reexamination

Antiferroelectricity in oxides: a reexamination Karin M. Rabe* Department of Physics and Astronomy Rutgers University, Piscataway, NJ 08854 * Corresponding Author: rabe@physics tgers

Studien identifiserer et alternativ med høy ytelse til konvensjonell ...

Forskere og samarbeidspartnere fra Rice University ved University of California, Berkeley har funnet ut at en klasse av elektromekanisk aktive materialer kalt antiferroelektriske stoffer kan …

Room-temperature antiferromagnetic memory resistor

Magnetic memory devices are typically based on ferromagnetic materials. Now, a memory resistor based on the antiferromagnetic alloy FeRh is demonstrated at room temperature.

Termokjemisk energilagring: Neste generasjons termiske batterier?

Termiske energilagringsmaterialer kan lagre varme eller kulde gjennom sine fysiske/kjemiske egenskaper og frigjøre det timer, dager eller til og med måneder senere. …

Deltagelse I samlet IEA SHC Task 67 og ES Task 40 "Compact …

at få en bedre forståelse af de faktorer, der påvirker varmelagringstætheden og ydelsesforringelsen for kompakte termiske energilagringsmaterialer; at blive i stand til at …

Building a framework for domain characterisation of …

Det foreslås at disse korngrensene enten skiller to antiferroelektriske domener eller at de skiller to sub-korn. Det korrelerte mikroskopistudiet indikerer at KNBO mister sine ferroelastiske …

Antiferroelektrisitet

Antiferroelektriske materialer er karakterisert i mikroskopisk skala ved tilstedeværelsen av elektriske dipoler justert i motsatte retninger, og makroskopisk av en dobbel hysteresekurve for …

Antiferroelectricity | Electrical4U

Antiferroelectricity is a physical property of materials with ions that polarize without an external field, known as spontaneous polarization. These dipoles are arranged in alternating orientations, with adjacent lines in opposite directions (anti-parallel). When an electric field is applied, it causes a phase transition, resulting in large strain and energy…

Ferromagnetism and antiferromagnetism • ferromagnetism …

Ferromagnetism and antiferromagnetism • ferromagnetism (FM) • exchange interaction, Heisenberg model • spin wave, magnon • antiferromagnetism (AFM)

5.1.1: Antiferromagnetism

Temperature Dependence. Antiferromagnetic material''s magnetic moments are temperature dependent and their critical temperature is the Neel temperature, (T_N), at which a magnetic phase change occurs …

Antiferro skyrmion crystals consisting of skyrmions and anti …

An antiferro-type skyrmion crystal consisting of skyrmions with a negative topological charge and antiskyrmions with a positive topological charge manifests itself in its peculiar topological magnetism. We theoretically investigate the emergence of such an antiferro-type skyrmion crystal, where the topological charge exists in each sublattice but vanishes in …

Nanoscale mechanics of antiferromagnetic domain walls

Antiferromagnets can encode information in their ordered magnetic structure, providing the basis for future spintronic devices1–3. The control and understanding of antiferromagnetic domain walls ...

Chiral multiferroicity in two-dimensional hybrid organic-inorganic ...

Chiral multiferroics offer remarkable capabilities for controlling quantum devices at multiple levels. However, these materials are rare due to the competing requirements of long-range orders and ...

Antiferromagnetism. Theory of Superexchange Interaction

ANTIFERROMAGNETISM, SUPE REXCHANGE INTERACTION 35i Let us, to fix our ideas, think of the system of two magnetic ions, such as Mn++, separated by an 0 ion. We shall, for simplicity, consider only two of the elec- trons on the 0 ion, assuming them to be in the same p-state; in addition we shall consider the magnetic ions as possessing one electron each, in (for example) …

Aerosol deposited silver niobate for energy storage applications

Energilagringsenheter med høy energi- og effekttetthet er nødvendige for å tilrettelegge for storskala bruk av fornybare energikilder. Ved å bruke antiferroelektriske materialer i dielektriske energilagringskondensatorer er det mulig å oppnå høyere energitetthet enn ved bruk av andre …

Antiferroelektriske materialer: unike egenskaper og bruksområder

Lær om egenskapene og bruksområdene til antiferroelektriske materialer, inkludert deres reversible elektriske polarisering, høye piezoelektriske koeffisienter, lav varmeledningsevne og …

Structure, antiferro/ferro-electric transformation and relaxor ...

Abstract. The superlattice structure and dielectric relaxor behaviour were simultaneously observed in (1-x)Pb(Yb 1/2 Nb 1/2)O 3-xPb(Mg 1/2 W 1/2)O 3 ((1-x)PYN-xPMW) ceramics composed by highly ordered end members.Orthorhombic perovskite structure was determined by X-ray diffraction for the compositions of x = 0·0–0·2 and 0·8–1·0 with two sets of …

Phys. Rev. Materials 5, 114401 (2021)

Recent work analyzing the impact of nonsymmorphic symmetries on electronic states has given rise to the discovery of multiple types of topological matter. Here we report the single-crystal synthesis and magnetic properties of $mathrm{Eu}{mathrm{Ga}}_{2}{mathrm{Sb}}_{2}$, a Eu-based antiferromagnet structurally …

Antiferro Quadrupole Orders in Non-Kramers Doublet Systems

We investigate antiferro quadrupole orders in systems with non-Kramers doublet ground state with total angular momentum J = 4 in T d point group symmetry. We demonstrate that a pure (O_{2}^{2}) antiferro quadrupole order is impossible in general crystalline-electric field potential and should be accompanied by ferro (O_{2}^{0}) quadrupole moment. The …

Thin films of relaxor ferroelectric/antiferroelectric heterolayered ...

We report the energy-storage performance and electric breakdown field of antiferroelectric PbZrO 3 (PZ) and relaxor ferroelectric Pb 0.9 La 0.1 (Zr 0.52 Ti 0.48)O 3 (PLZT) single films, as well as PLZT/PZ and PZ/PLZT heterolayered films grown on SrRuO 3 /Ca 2 Nb 3 O 10 –nanosheet/Si substrates using pulsed laser deposition. These films show the highly …

Magnetization reversal through an antiferromagnetic state

Magnetization reversal is a well-studied non-equilibrium process by which a ferromagnet or ferrimagnet reverses its magnetization direction under an applied magnetic field larger than the coercive ...

Realization of a bosonic antiferromagnet | Nature Physics

Quantum antiferromagnets are of broad interest in condensed-matter physics as they provide a platform for studying exotic many-body states1 including spin liquids2 and high-temperature ...

Domains and domain walls in multiferroics

1 Domain structures in (multi-)ferroics 1.1 Introduction to ferroic domains and domain walls. Ferroic materials are defined by the appearance of an order parameter (e.g., elastic, electric or magnetic) at a non-disruptive phase transition. If at least two order parameters coexist in the same phase, the material is called a multiferroic [].The order parameter(s) can point in at least …

Termokjemisk energilagring: Neste generasjons termiske batterier?

Termiske energilagringsmaterialer kan lagre varme eller kulde gjennom sine fysiske/kjemiske egenskaper og frigjøre det timer, dager eller til og med måneder senere. Avhengig av hvordan materialene oppfører seg ved temperaturvariasjoner, klassifiserer vi dem i tre hovedtyper (se figur 1):

Antiferromagnetic phase transition in a 3D fermionic Hubbard model

Antiferromagnetic phase transition is observed in a three-dimensional fermionic Hubbard system comprising lithium-6 atoms in a uniform optical lattice with approximately 800,000 sites.

Strongly correlated antiferromagnetic vanadates

Antiferromagnetic (AFM) materials are intrinsically magnetic but have zero net magnetic moments at ground state due to the alignment of adjacent magnetic moments antiparallel to each other. 1 Unlike ferromagnetic (FM) materials, the AFM materials are robust against magnetic disturbances and exhibit negligible stray fields and fast spin dynamics of …

Antiferromagnetism

In materials that exhibit antiferromagnetism, the magnetic moments of atoms or molecules, usually related to the spins of electrons, align in a regular pattern with neighboring spins (on different sublattices) pointing in opposite directions. This is, like ferromagnetism and ferrimagnetism, a manifestation of ordered magnetism.The phenomenon of antiferromagnetism …

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Har bygget en nasjonal post-doktor arbeidsstasjon, teknologiforskningsinstitusjon for energilagringsmaterialer. Med internasjonalt avansert automatisk utstyr og utmerket …

Multiskala elektrokjemisk modellering

På SINTEF utvikler vi banebrytende multiskala modelleringsverktøy for å støtte både vitenskapelig utvikling av nye energilagringsmaterialer og teknisk integrering av …

energilagringsmaterialer

Energilagringsmaterialer er materialer som enkelt kan ta opp og avgi energi. De enkleste energilagringsmaterialene er vann og stein. I disse kan varme lagres i form av økte …

Antiferromagnetism

What is Antiferromagnetism? Antiferromagnetism is a fascinating magnetic phenomenon that occurs when adjacent magnetic moments in a material align in an antiparallel fashion, meaning they point in opposite directions. Unlike ferromagnetic materials, where magnetic moments align parallelly, antiferromagnetic materials achieve a state of perfect …