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Related Concept Videos

Ferromagnetism01:31

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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...
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When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
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Fermi Level Dynamics01:12

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The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
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The work...
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A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
Static Equilibrium - I01:05

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A rigid body is said to be in dynamic equilibrium when both its linear and angular acceleration are zero, relative to an inertial frame of reference. This means that a body in equilibrium can be moving, but only when its linear and angular velocities are constant. A rigid body is said to be in static equilibrium when it is at rest in the selected frame of reference. The distinction between static equilibrium (e.g., a state of rest) and dynamic equilibrium (e.g, a state of uniform motion) is...
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Static equilibrium is a special case in mechanics that is very important in everyday life. It occurs when the net force and the net torque on an object or system are both zero. This means that both the linear and angular accelerations are zero. Thus, the object is at rest, or its center of mass is moving at a constant velocity. However, this does not mean that no forces are acting on the object within the system. In fact, there are very few scenarios on Earth in which no forces are acting upon...

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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Nanoferroelectrics: statics and dynamics.

J F Scott1

  • 1Earth Sciences Department, University of Cambridge, Cambridge, UK.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|June 22, 2011
PubMed
Summary
This summary is machine-generated.

This review covers the physics of submicron ferroelectrics, focusing on their use in memory devices like ferroelectric nonvolatile random access memories (FRAMs) and dynamic random access memories (DRAMs). It also explores fundamental physics challenges related to device size.

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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
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Area of Science:

  • Solid State Physics
  • Materials Science
  • Electrical Engineering

Background:

  • Ferroelectric materials exhibit spontaneous electric polarization.
  • Submicron-scale ferroelectrics present unique physical phenomena.
  • Applications in electronic memory devices are a key driver of research.

Purpose of the Study:

  • To provide a comprehensive review of the physics governing submicron ferroelectric materials.
  • To discuss the practical application considerations for ferroelectric memory devices.
  • To highlight fundamental physics questions concerning size effects in ferroelectrics.

Main Methods:

  • Topical review of existing literature.
  • Analysis of application requirements for memory devices.
  • Discussion of theoretical and experimental findings on size-dependent ferroelectric properties.

Main Results:

  • Submicron ferroelectrics are crucial for advanced memory technologies.
  • Both ferroelectric nonvolatile random access memories (FRAMs) and dynamic random access memories (DRAMs) benefit from these materials.
  • Critical size effects in thickness and lateral dimensions impact device performance.

Conclusions:

  • Understanding the physics of submicron ferroelectrics is essential for next-generation electronics.
  • Further research is needed to address fundamental questions about size limitations.
  • Optimizing ferroelectric materials at the submicron scale will enable smaller, faster, and more efficient memory devices.