# Magnetic resonance of rubidium atoms passing through a multi-layered transmission magnetic grating

## TL;DR

This study investigates the magnetic resonance of rubidium atoms passing through multilayered transmission magnetic gratings, demonstrating potential for high-frequency, narrow-linewidth magnetic resonance spectroscopy.

## Contribution

It introduces multilayered magnetic gratings with adjustable magnetization configurations and analyzes their potential to extend frequency bands and narrow resonance linewidths.

## Key findings

- Good agreement between experimental results and calculations.
- Multi-layered gratings can produce narrower linewidths at higher frequencies.
- Potential to achieve resonance frequencies up to hundreds of PHz.

## Abstract

We measured the magnetic resonance of rubidium atoms passing through periodic magnetic fields generated by two types of multilayered transmission magnetic grating. One of the gratings reported here was assembled by stacking four layers of magnetic films so that the direction of magnetization alternated at each level. The other grating was assembled so that the magnetization at each level was aligned. For both types of grating, the experimental results were in good agreement with our calculations. We studied the feasibility of extending the frequency band of the grating and narrowing its resonance linewidth by performing calculations. For magnetic resonance precision spectroscopy, we conclude that the multi-layered transmission magnetic grating can generate periodic fields with narrower linewidths at higher frequencies when a larger number of layers is assembled at a shorter period length. Moreover, the frequency band of this type of grating can potentially achieve frequencies of up to hundreds of PHz.