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

Paramagnetism01:30

Paramagnetism

Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

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. This...
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

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...
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

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, and the angular frequency...
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

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...
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...

You might also read

Related Articles

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

Sort by
Same author

OPM-based fetal magnetocardiography: fetal cardiac time intervals in healthy pregnancies compared to postnatal ECGs.

Archives of gynecology and obstetrics·2026
Same author

Fetal Long QT Syndrome: Case Series and Literature Review With Focus on Multidisciplinary Care Coordination.

Case reports in cardiology·2026
Same author

Fetal Conduction Disease and Arrhythmia in Ebstein's Anomaly and Tricuspid Valve Dysplasia Assessed by Fetal Magnetocardiography.

Journal of the American Heart Association·2025
Same author

Greedy Optimization of Sensor Array Geometry for Magnetocardiographic Source Localization.

IEEE transactions on bio-medical engineering·2025
Same author

Fetal T-wave and isovolumetric relaxation time alternans can be identified by fetal echocardiography.

Heart rhythm·2024
Same author

Curdepsidone A Induces Intrinsic Apoptosis and Inhibits Protective Autophagy via the ROS/PI3K/AKT Signaling Pathway in HeLa Cells.

Marine drugs·2024
Same journal

Concentric transmon qubit featuring fast tunability and an anisotropic magnetic dipole moment.

Applied physics letters·2026
Same journal

Wobulation using a tunable electrowetting prism applied to structured illumination microscopy.

Applied physics letters·2026
Same journal

Superconducting micro-resonator arrays with ideal frequency spacing.

Applied physics letters·2025
Same journal

Overlap junctions for high coherence superconducting qubits.

Applied physics letters·2025
Same journal

Controlling the thermal conductance of silicon nitride membranes at 100 mK temperatures with patterned metal features.

Applied physics letters·2025
Same journal

Overlap junctions for superconducting quantum electronics and amplifiers.

Applied physics letters·2025
See all related articles

Related Experiment Video

Updated: May 19, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Parametric modulation of an atomic magnetometer.

Zhimin Li1, Ronald T Wakai, Thad G Walker

  • 1Department of Medical Physics, University of Wisconsin-Madison, Madison, Wisconsin 53705.

Applied Physics Letters
|September 4, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed a rubidium atomic magnetometer for shielded environments. This device suppresses airflow noise and detects magnetic fields in multiple directions with high sensitivity.

More Related Videos

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons
09:54

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons

Published on: July 14, 2021

Related Experiment Videos

Last Updated: May 19, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons
09:54

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons

Published on: July 14, 2021

Area of Science:

  • Atomic physics
  • Magnetometry
  • Sensor technology

Background:

  • Atomic magnetometers offer high sensitivity for magnetic field detection.
  • Shielded environments require specialized sensors to mitigate external noise.
  • Previous designs faced challenges with airflow noise and multi-component detection.

Purpose of the Study:

  • To design and evaluate a rubidium atomic magnetometer for operation in a shielded environment.
  • To implement a technique for noise suppression and simultaneous multi-axis magnetic field measurement.
  • To achieve a low noise level for enhanced magnetic field sensing capabilities.

Main Methods:

  • Utilized a rubidium atomic magnetometer operating in the spin-exchange relaxation-free (SERF) regime.
  • Employed parametric modulation of the z-magnetic field to suppress airflow noise.
  • Implemented a single probe beam for simultaneous detection of x- and y-magnetic field components.

Main Results:

  • Achieved a white noise level of 60 fT/(Hz)(1/2).
  • Successfully suppressed noise associated with airflow through the oven.
  • Demonstrated simultaneous detection of x- and y-field components with minimal sensitivity and bandwidth loss.

Conclusions:

  • The developed rubidium atomic magnetometer is effective in shielded environments.
  • Parametric modulation is a viable technique for noise reduction and multi-component sensing.
  • The device offers a promising solution for sensitive magnetic field measurements in challenging conditions.