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Influence of Nd on the magnetic properties of Nd1-xCaxMnO3: an ESR study

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de Brion,  S.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Chouteau,  G.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Dupont, F., Millange, F., de Brion, S., Janossy, A., & Chouteau, G. (2002). Influence of Nd on the magnetic properties of Nd1-xCaxMnO3: an ESR study. Physical Review B, 64(22): 220403.


Cite as: https://hdl.handle.net/21.11116/0000-000E-EB09-0
Abstract
The role played by the Nd ions in the magnetic properties of
Nd0.5Ca0.5MnO3 and Nd0.7Ca0.3MnO3 is studied using static
magnetization, neutron diffraction, and high frequency 9.4-475
GHz) electron spin resonance (ESR). We show that the Nd ions
are weakly coupled to the Mn ions via ferromagnetic exchange
and are responsible for the peculiar ferromagnetic resonance
observed in the FM phase of both compounds (ground state below
120 K for x = 0.3, high field state for x = 0.5). We then use
ESR to look for magnetic phase separation in the low field,
charge order (CO) phase of Nd0.5Ca0.5MnO3. We show that there
is no trace of the FM phase imbedded in the CO phase, contrary
to what is observed in La0.5Ca0.5MnO3 or Pr0.5Sr0.5MnO3.