Related Experiment Video
Updated: Mar 6, 2026
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
9.8K
Analog Control of Reconfigurable GHz Resonances from Chiral Spin Texture Ensembles
T S Suraj1, Jifei Huang1, Hui Ru Tan2
1Department of Physics, National University of Singapore, Singapore, Singapore.
Advanced Materials (Deerfield Beach, Fla.)
|March 4, 2026
Summary
Researchers engineered a new magnetic multilayer for energy-efficient microelectronics. This material enables tunable microwave resonances using chiral spin textures (CSTs), paving the way for reconfigurable magnonics and advanced computing.
Area of Science:
- Spintronics
- Materials Science
- Microwave Engineering
Background:
- Gigahertz excitations in magnetic films are crucial for high-frequency microelectronics.
- Nanoscale chiral spin textures (CSTs) offer potential for novel resonance characteristics.
- Previous chiral multilayers faced material limitations hindering functional CST resonances.
Purpose of the Study:
- To engineer a low-damping, strongly chiral multilayer with robust broadband resonance.
- To investigate the resonance characteristics and tunability of CSTs in this new material.
- To explore the potential of CSTs for reconfigurable magnonics and unconventional computing.
Main Methods:
- Fabrication of a minimally damped, strongly chiral multilayer.
- Microwave spectroscopy and Lorentz microscopy for characterizing resonance features.
- Analytical modeling and simulations to understand inter-textural resonances.
Main Results:
- The engineered multilayer exhibits a robust broadband resonance spectrum.
- Distinct resonance features were observed on either side of zero magnetic field due to irreversible CST transitions.
- In situ reconfigurability of CSTs allowed for analog tunability of resonant dispersion.
- A simple analytical model accurately described the observed resonances.
Conclusions:
- The study unlocks the microwave potential of multilayer CSTs through engineered thermodynamics.
- This work enables fabrication-free reconfigurable magnonics for broadband transmission.
- The findings open avenues for unconventional computing applications.
Related Concept Videos
01:12Double Resonance Techniques: Overview
827
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
827
00:58¹H NMR Chemical Shift Equivalence: Enantiotopic and Diastereotopic Protons
3.5K
Replacing each alpha-hydrogen in chloroethane by bromine (or a different functional group) yields a pair of enantiomers. Such protons are called prochiral or enantiotopic and are related by a mirror plane. Enantiotopic protons are chemically equivalent in an achiral environment. Because most proton NMR spectra are recorded using achiral solvents, enantiotopic hydrogens yield a single signal.
In chiral compounds such as 2-butanol, replacing the methylene hydrogens at C3 produces a pair of...
In chiral compounds such as 2-butanol, replacing the methylene hydrogens at C3 produces a pair of...
3.5K
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.7K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.7K
02:30Chirality in Nature
17.5K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
17.5K
02:05Prochirality
5.2K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
5.2K
02:16Resonance and Hybrid Structures
28.2K
According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
28.2K