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Related Concept Videos

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...
Ferromagnetism01:31

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
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Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The semiconductor's...
Magnetic Fields01:28

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
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Diamagnetism01:26

Diamagnetism

Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
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Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
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Related Experiment Video

Updated: Jul 14, 2026

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
06:44

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Published on: June 9, 2023

Magnetic effects at the interface between non-magnetic oxides.

A Brinkman1, M Huijben, M van Zalk

  • 1Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands. a.brinkman@utwente.nl

Nature Materials
|June 5, 2007
PubMed
Summary

Interface-induced magnetism was discovered in non-magnetic insulating oxides SrTiO3 and LaAlO3. This finding opens new avenues for manipulating magnetic properties in advanced materials.

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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7&#8722;&#948;/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates
06:49

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates

Published on: April 12, 2019

Area of Science:

  • Solid-state science
  • Materials science
  • Condensed matter physics

Background:

  • Electronic reconstruction at oxide interfaces can create high conductivity.
  • Magnetic ordering and its mechanisms are crucial research areas in solid-state science.
  • Interactions between magnetic moments and electron spins lead to complex many-body effects.

Purpose of the Study:

  • To investigate the induction of magnetism at the interface between non-magnetic insulating perovskites SrTiO3 and LaAlO3.
  • To explore the analogy between interface-induced conductivity and magnetism.
  • To understand the magnetic properties of this novel oxide interface.

Main Methods:

  • Fabrication of heterostructures using SrTiO3 and LaAlO3.
  • Electrical transport measurements, including sheet resistance as a function of temperature and magnetic field.
  • Magnetic characterization through magnetic hysteresis measurements.

Main Results:

  • Demonstrated interface-induced magnetism in SrTiO3/LaAlO3 heterostructures.
  • Observed a large negative magnetoresistance.
  • Characterized a logarithmic temperature dependence of sheet resistance and magnetic hysteresis at low temperatures.

Conclusions:

  • The conducting oxide interface serves as a versatile platform for inducing and controlling magnetism in non-magnetic materials.
  • This work provides new insights into the fundamental mechanisms of magnetism in oxide systems.
  • The findings have potential implications for spintronics and novel magnetic devices.