Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

599
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
599
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

598
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
598
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

1.1K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
1.1K
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

830
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
830
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

1.0K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
1.0K
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

631
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
631

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Hydride-Mediated Hydrogen Activation on Cobalt-Alloyed Single-Atom Palladium Catalysts for Efficient H<sub>2</sub>O<sub>2</sub> Synthesis.

Journal of the American Chemical Society·2026
Same author

Characterizing current noise of commercial constant-current sources by using an optically pumped rubidium atomic magnetometer.

The Review of scientific instruments·2023
Same author

A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay.

Sensors (Basel, Switzerland)·2022
Same author

Strip rotary tillage with a two-year subsoiling interval enhances root growth and yield in wheat.

Scientific reports·2019
Same author

[Single nucleotide polymorphisms associated with susceptibility to hepatocellular carcinoma in Inner Mongolian Han and Mongolian populations].

Zhonghua gan zang bing za zhi = Zhonghua ganzangbing zazhi = Chinese journal of hepatology·2015
Same author

Theory and application for the promotion of wheat production in China: past, present and future.

Journal of the science of food and agriculture·2013
Same journal

Cluster assisted soft-landing hub (CLASH): An instrument for surface desorption and deposition using a pulsed cluster ion source.

The Review of scientific instruments·2026
Same journal

Influence of pre-ionization parameters on multi-channel discharge characteristics of field-distortion switch gaps.

The Review of scientific instruments·2026
Same journal

A Joule-Thomson low-temperature scanning tunneling microscope with vector magnet and rotatable scanning head.

The Review of scientific instruments·2026
Same journal

Fiber-optic triggering of a two-stage high-current linear transformer driver with laser energy below 100 μJ.

The Review of scientific instruments·2026
Same journal

Optimization of laboratory-scale x-ray absorption spectroscopy (XAS) apparatus for nuclear fuel research.

The Review of scientific instruments·2026
Same journal

Compressed multi-scale entropy and its application in mechanical fault diagnosis.

The Review of scientific instruments·2026
See all related articles

Related Experiment Video

Updated: May 20, 2025

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
08:55

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy

Published on: October 9, 2020

5.4K

Spin alignment based Rb-87 magnetometry with free spin precession.

Yang Li1, Lulu Zhang1, Yongbiao Yang1

  • 1State Key Laboratory of Quantum Optics Technologies and Devices, and Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China.

The Review of Scientific Instruments
|March 26, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces spin alignment magnetometry using Rb-87 vapor and free spin precession. The optimized system achieves a notable sensitivity of 1.7 pT/√Hz for magnetic field measurements.

More Related Videos

Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

23.1K
Dual DNA Rulers to Study the Mechanism of Ribosome Translocation with Single-Nucleotide Resolution
10:27

Dual DNA Rulers to Study the Mechanism of Ribosome Translocation with Single-Nucleotide Resolution

Published on: July 8, 2019

6.2K

Related Experiment Videos

Last Updated: May 20, 2025

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
08:55

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy

Published on: October 9, 2020

5.4K
Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

23.1K
Dual DNA Rulers to Study the Mechanism of Ribosome Translocation with Single-Nucleotide Resolution
10:27

Dual DNA Rulers to Study the Mechanism of Ribosome Translocation with Single-Nucleotide Resolution

Published on: July 8, 2019

6.2K

Area of Science:

  • Atomic Physics
  • Quantum Optics
  • Magnetometry

Background:

  • Spin alignment in atomic vapors is a key phenomenon for sensitive magnetic field detection.
  • Free spin precession offers a method for probing magnetic fields with high precision.

Purpose of the Study:

  • To propose and investigate a novel spin alignment based magnetometry technique using Rubidium-87 (Rb-87).
  • To optimize the experimental parameters for enhanced sensitivity in Rb-87 magnetometry.
  • To measure the sensitivity of the proposed free spin precession magnetometry system.

Main Methods:

  • Utilizing a 795-nm linearly polarized laser as both pump and probe beams propagating through Rb-87 vapor.
  • Applying a static magnetic field along the Y-axis and a radio-frequency (RF) magnetic field pulse along the Z-axis.
  • Employing a balanced polarimeter with a half-wave plate, Wollaston prism, and differential photodiode to detect free precession signals.

Main Results:

  • Achieved spin alignment by inducing a symmetric population distribution and magnetic quadrupole moment in Rb-87 ground-state atoms.
  • Optimized pump power and RF magnetic field strength for improved performance.
  • Demonstrated a sensitivity of approximately 1.7 pT/√Hz for the Rb-87 magnetometry system.

Conclusions:

  • The proposed spin alignment based Rb-87 magnetometry with free spin precession is a viable technique for sensitive magnetic field measurements.
  • Optimization of experimental parameters is crucial for achieving high sensitivity.
  • The system demonstrates potential for various applications requiring precise magnetic field detection.