The exchange coupling as being responsible for ferromagnetism is not the mutual magnetic interaction between two elementary magnetic dipoles. To show this, calculate (a) the magnitude of the magnetic field a distance of 13 nm away, along a dipole axis, from an atom with magnetic dipole moment 1.2 × 1023 J/T, and (b) the minimum energy required to turn a second identical dipole end for end in this field. (a) Number i Units

The exchange coupling as being responsible for ferromagnetism is not the mutual magnetic interaction between two elementary magnetic dipoles. To show this, calculate (a) the magnitude of the magnetic field a distance of 13 nm away, along a dipole axis, from an atom with magnetic dipole moment 1.2 × 1023 J/T, and (b) the minimum energy required to turn a second identical dipole end for end in this field. (a) Number i Units

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter8: Atomic Structure

Section: Chapter Questions

Problem 49P: Show that U=B . (Hint: An infinitesimal amount of work is done to align the magnetic moment with the...

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The exchange coupling as being responsible for ferromagnetism is not thė mutual magnetic interaction between two elementary magnetic dipoles. To show this, calculate (a) the magnitude of the magnetic field a distance of 13 nm away, along a dipole axis, from an atom with magnetic dipole moment 1.2 × 10 23 J/T, and (b) the minimum energy required to turn a second identical dipole end for end in this field. (a) Number 1.1E-6 Units (b) Number i 1.3E-29 Units J
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