Abstract
Neutron-diffraction techniques have been used to study the magnetic ordering of the Nd ions in semiconducting ${\mathrm{Nd}}_{2}$${\mathrm{CuO}}_{4}$ and superconducting ${\mathrm{Nd}}_{1.85}$${\mathrm{Ce}}_{0.15}$${\mathrm{CuO}}_{4}$. For the Ce-doped system a sharp transition to long-range antiferromagnetic order occurs at ${T}_{N}$\ensuremath{\approxeq}1.2 K, with a simple magnetic unit cell which is double the chemical unit cell along the a and b directions. The same magnetic structure is observed in the parent system ${\mathrm{Nd}}_{2}$${\mathrm{CuO}}_{4}$, in which the Cu spins are also ordered magnetically, but strong coupling between the Nd and Cu sublattices is indicated.
Highlights
The Rapid Communications section is intended for the accelerated publication of important new results
The microscopic magnetic properties of superconductors have been of interest for many years, first for "magnetic superconductor" systems, ' in heavy-fermion materials, and most recently in the oxide superconductors
The oxide superconductors provide the interesting situation of having both heavy rare earths which are often isolated in the lattice and order at low temperatures, and strongly coupled Cu spins which reside in the Cu-0 superconducting planes
Summary
The Rapid Communications section is intended for the accelerated publication of important new results. Magnetic ordering of Nd in (Nd, Ce)2Cu04 The same magnetic structure is observed in the parent system Nd2Cu04, in which the Cu spins are ordered magnetically, but strong coupling between the Nd and Cu sublattices is indicated.
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