Muons and magnets

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ChemInform Abstract: Control of Magnetic Ordering by Jahn—Teller Distortions in Nd2GaMnO6 and La2GaMnO6.

ChemInform Wiley 32:21 (2001) no-no

Authors:

Edmund J Cussen, Matthew J Rosseinsky, Peter D Battle, Jonathan C Burley, Lauren E Spring, Jaap F Vente, Stephen J Blundell, Amalia I Coldea, John Singleton
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Test for interlayer coherence in a quasi-two-dimensional superconductor

(2001)

Authors:

John Singleton, PA Goddard, A Ardavan, N Harrison, SJ Blundell, JA Schlueter, AM Kini
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Muon‐Spin Rotation Studies of Molecule‐Based Magnets

Chapter in Magnetism: Molecules to Materials I, Wiley (2001) 235-256
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A mu SR study of the CDW in TTF-TCNQ

SYNTHETIC MET 120:1-3 (2001) 997-998

Authors:

IM Marshall, FL Pratt, SJ Blundell, A Husmann, W Hayes, T Sugano

Abstract:

The muon spin rotation (mu SR) technique is primarily a powerful probe of the magnetic properties of materials; but it is also possible to measure charge-density related effects using muon quadrupolar level crossing resonance (QLCR). We present the first study of a charge density wave (CDW) using mu SR in TTF-TCNQ. The CDW develops below the metal-insulator transition at 54 K and we study the evolution of the CDW as a function of temperature using the QLCR resonances of the nitrogen atoms on the TCNQ molecules as the probe.
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A quantum-mechanical model of quasi-one-dimensional conductors

SYNTHETIC MET 120:1-3 (2001) 1009-1010

Authors:

A Ardavan, J Singleton, SJ Blundell

Abstract:

We present a model of a quasi-one-dimensional (Q1D) conductor with weak dispersion in the direction perpendicular to the chains in a magnetic field. Finite-energy electric dipole transitions between the eigenstates of the system constitute Fermi-surface traversal resonance, a Q1D analogue of cyclotron resonance. We extend the model to describe a (TMTSF)(2)X-like material, with dispersion in two directions perpendicular to the chains, and find that for certain orientations of the magnetic field large degeneracies occur between the magnetic-field induced states. These are angles at which maxima are observed experimentally in the d.c. conductivity, and thus we explain one class of angle-dependent magnetoresistance oscillations (AMRO) in terms of zero-energy electric dipole transitions between magnetic-field induced states.
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