Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Plane Electromagnetic Waves II

Plane Electromagnetic Waves II

Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.

Standing Electromagnetic Waves

Standing Electromagnetic Waves

Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...

Electrostatic Boundary Conditions

Electrostatic Boundary Conditions

Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...

Magnetostatic Boundary Conditions

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...

Angle of Twist - Elastic Range

Angle of Twist - Elastic Range

Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...

Unsymmetric Bending - Angle of Neutral Axis

Unsymmetric Bending - Angle of Neutral Axis

Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal centroidal axes. The...

You might also read

Related Articles

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

Sort by

Same author

Experimental realization of a π/2 vortex mode converter for electrons using a spherical aberration corrector.

Ultramicroscopy·2021

Same author

Iron deficiency during first-line chemotherapy in metastatic cancers: a prospective epidemiological study.

Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer·2019

Same author

π/2 mode converters and vortex generators for electrons.

Ultramicroscopy·2019

Same author

Insights into image contrast from dislocations in ADF-STEM.

Ultramicroscopy·2019

Same author

Analysis of intra-hospital transfers and hospital-onset Clostridium difficile infection.

The Journal of hospital infection·2018

Same author

Three-dimensional scanning transmission electron microscopy of dislocation loops in tungsten.

Micron (Oxford, England : 1993)·2018

Search research articles

Related Experiment Video

Updated: Jul 16, 2026

Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity

Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity

Published on: January 15, 2014

ELNES at magic angle conditions.

C Hébert¹, P Schattschneider, H Franco

¹Institut für Festkörperphysik, Technische Universität Wien, A-1040 Wien, Austria. cecile.hebert@tuwien.ac.at

Ultramicroscopy

|August 29, 2006

Summary

To cancel sample anisotropy in electron energy loss spectroscopy (EELS) experiments, specific magic angle conditions (MAC) are required. These MAC are strongly dependent on acceleration voltage and can be precisely calculated using a new analytical formula.

More Related Videos

Fabrication and Operation of a Nano-Optical Conveyor Belt

Fabrication and Operation of a Nano-Optical Conveyor Belt

Published on: August 26, 2015

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Related Experiment Videos

Last Updated: Jul 16, 2026

Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity

Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity

Published on: January 15, 2014

Fabrication and Operation of a Nano-Optical Conveyor Belt

Fabrication and Operation of a Nano-Optical Conveyor Belt

Published on: August 26, 2015

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Area of Science:

* Materials Science
* Physics
* Electron Microscopy

Background:

* Electron Energy Loss Spectroscopy (EELS) is a powerful technique for materials analysis.
* Sample anisotropy can complicate EELS data interpretation.
* Previous theoretical treatments did not fully account for relativistic effects.

Purpose of the Study:

* To derive an analytical formula for Magic Angle Conditions (MAC).
* To investigate the dependence of MAC on acceleration voltage.
* To provide practical guidance for EELS experiments.

Main Methods:

* Relativistic treatment of EELS.
* Derivation of analytical formulas for MAC.
* Analysis of energy dependence and beam parallelity effects.

Main Results:

* An exact analytical solution for MAC is presented.
* MAC are shown to be strongly dependent on acceleration voltage.
* Beam parallelity limits MAC at high voltages; Bragg spots interfere at low voltages.

Conclusions:

* The derived analytical formula enables precise calculation of MAC for practical EELS applications.
* Understanding voltage-dependent MAC is crucial for accurate anisotropy cancellation.
* Experimental limitations at different acceleration voltages are identified.