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Related Concept Videos

Constant Pressure Calorimetry03:02

Constant Pressure Calorimetry

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Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
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Atomic Nuclei: Nuclear Spin State Population Distribution01:14

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Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
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Calorimetry01:19

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When objects at different temperatures are placed in contact with each other but isolated from everything else, they attain thermal equilibrium. A container that prevents heat transfer in or out is called a calorimeter, and the use of a calorimeter to make measurements is called calorimetry. Generally, these measurements involve heat or specific heat capacity. The term "calorimetry problem" is used for any problem where the specified objects are thermally isolated from their...
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Constant Volume Calorimetry02:41

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Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...
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In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
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Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
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Transport phenomena in spin caloritronics.

Ken-Ichi Uchida1,2,3

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Spin caloritronics explores converting spin, charge, and heat currents. This review clarifies thermo-spin conversion phenomena like the spin Seebeck effect for new researchers.

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magnetic materialmagneto-thermoelectric effectspin Peltier effectspin Seebeck effectspin caloritronicsspin current

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Area of Science:

  • Physics
  • Materials Science
  • Engineering

Background:

  • Spin caloritronics, a subfield of spintronics, investigates the interconversion of spin, charge, and heat currents.
  • The spin Seebeck effect, a key thermo-spin conversion phenomenon, has driven rapid advancements in the field.
  • Magneto-thermoelectric effects in magnetic materials are gaining attention due to improved understanding and measurement techniques.

Purpose of the Study:

  • To provide a clear summary of spin-caloritronic phenomena for new researchers.
  • To elucidate the basic behaviors, conversion symmetries, and functionalities of these phenomena.
  • To demystify the terminology surrounding various thermo-spin and magneto-thermoelectric effects.

Main Methods:

  • Literature review and synthesis of existing research on spin caloritronics.
  • Categorization and comparison of different thermo-spin and magneto-thermoelectric phenomena.
  • Analysis of fundamental physics, materials science, and application aspects.

Main Results:

  • A structured overview of spin-caloritronic phenomena, including their fundamental principles.
  • Clarification of spin-charge-heat current conversion symmetries.
  • Identification of key functionalities relevant to thermoelectric applications.

Conclusions:

  • This review consolidates knowledge in spin caloritronics, aiding new entrants.
  • Understanding these phenomena is crucial for advancing thermoelectric applications.
  • The field offers rich opportunities for fundamental physics and materials science research.