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

Galvanometer01:25

Galvanometer

2.5K
Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), current, or resistance using a d'Arsonval galvanometer. This electromechanical instrument is also known as a moving coil galvanometer.
The galvanometer consists of  two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform...
2.5K
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

254
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
254
Magnetic Declination01:19

Magnetic Declination

223
Magnetic declination is the angle between true north, which aligns with the Earth's rotational axis, and magnetic north, which follows the direction of the Earth's magnetic field. This discrepancy exists because the magnetic poles do not coincide with the geographic poles. The value of magnetic declination depends on the observer's location on Earth and is subject to changes over time due to the dynamic nature of the Earth's magnetic field.The declination is called eastern when magnetic north...
223
Precipitation Gravimetry01:03

Precipitation Gravimetry

10.3K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
10.3K
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

255
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
255
Gravimetry: Overview01:05

Gravimetry: Overview

9.2K
Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
9.2K

You might also read

Related Articles

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

Sort by
Same author

Photoionization Current Spectroscopy of Individual Silicon Vacancies in Silicon Carbide.

Nano letters·2026
Same author

Defect-Activated and Surface-Modified Hexagonal Boron Nitride Nanoparticles toward Intracellular Quantum Sensing.

Nano letters·2026
Same author

Design of Magnetic Flux Concentrators for NV-Diamond Magnetoencephalography.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2025
Same author

Optical Charge State Manipulation of Lead-Vacancy Centers in Diamond.

Nano letters·2025
Same author

Functionalized Fluorescent Nanodiamonds with Millisecond Spin Relaxation Times.

ACS nano·2025
Same author

Formation of Cl-C Chemical Bonds by High-Energy Heavy Ion Irradiation of KCl/Graphene Heterostructures.

ACS omega·2025

Related Experiment Video

Updated: Nov 18, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

6.5K

Gradiometer Using Separated Diamond Quantum Magnetometers.

Yuta Masuyama1, Katsumi Suzuki2, Akira Hekizono3

  • 1Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, Takasaki, Gunma 370-1292, Japan.

Sensors (Basel, Switzerland)
|February 5, 2021
PubMed
Summary

This study presents a novel gradiometer using nitrogen-vacancy (NV) centers in diamonds for highly sensitive magnetic field detection. The device operates without magnetic shielding, achieving performance comparable to shielded systems in noisy environments.

Keywords:
gradiometer configurationmagnetometrynegatively charged nitrogen-vacancy (NV) center in diamondquantum sensingvariable base length

More Related Videos

Quantifying Mixing using Magnetic Resonance Imaging
07:33

Quantifying Mixing using Magnetic Resonance Imaging

Published on: January 25, 2012

11.2K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.7K

Related Experiment Videos

Last Updated: Nov 18, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

6.5K
Quantifying Mixing using Magnetic Resonance Imaging
07:33

Quantifying Mixing using Magnetic Resonance Imaging

Published on: January 25, 2012

11.2K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.7K

Area of Science:

  • Quantum Sensing
  • Materials Science
  • Condensed Matter Physics

Background:

  • Nitrogen-vacancy (NV) centers in diamond are sensitive spin defects enabling room-temperature magnetometry.
  • High-sensitivity magnetic field measurements typically require magnetically shielded enclosures to mitigate environmental noise.
  • Existing NV-center magnetometers face challenges in noisy environments without shielding.

Purpose of the Study:

  • To develop a gradiometer using NV centers in diamonds for sensitive magnetic field measurements.
  • To assess the performance of the gradiometer in reducing magnetic noise without external shielding.
  • To demonstrate the feasibility of NV-center magnetometry in unshielded, noisy conditions.

Main Methods:

  • Fabrication of a gradiometer utilizing a pair of diamond samples with negatively charged NV centers.
  • Integration of optical fibers for flexible sensor placement.
  • Characterization of the magnetic noise spectrum of the unshielded gradiometer.

Main Results:

  • The fabricated gradiometer operates at room temperature with variable sensor length.
  • The device achieved a magnetic noise spectrum comparable to a three-layer magnetically shielded enclosure.
  • Significant noise reduction was observed below 1 Hz and at 50 Hz power line frequency and its harmonics.

Conclusions:

  • The NV-center gradiometer demonstrates effective magnetic noise suppression without magnetic shielding.
  • This technology holds potential for highly sensitive magnetic sensing in challenging environments.
  • Applications include outdoor sensing and in-vehicle magnetic field measurements.