Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution

Yuen Yiu; Pietro Bonfà; Samuele Sanna; Roberto De Renzi; Pietro Carretta; Michael A. McGuire; Ashfia Huq; Stephen E. Nagler

doi:10.1103/PhysRevB.90.064515

Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution

Superconductivity 2015-06-22 v1

Authors: Yuen Yiu , Pietro Bonfà , Samuele Sanna , Roberto De Renzi , Pietro Carretta , Michael A. McGuire , Ashfia Huq , Stephen E. Nagler

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Abstract

Neutron diffraction and muon spin relaxation measurements are used to obtain a detailed phase diagram of Pr(Fe,Ru)AsO. The isoelectronic substitution of Ru for Fe acts effectively as spin dilution, suppressing both the structural and magnetic phase transitions. The temperature of the tetragonal-orthorhombic structural phase transition decreases gradually as a function of x. Slightly below the transition temperature coherent precessions of the muon spin are observed corresponding to static magnetism, possibly reflecting a significant magneto-elastic coupling in the FeAs layers. Short range order in both the Fe and Pr moments persists for higher levels of x. The static magnetic moments disappear at a concentration coincident with that expected for percolation of the J1-J2 square lattice model.

Keywords

PrFeAsO spin dilution magnetic phase transition structural phase transition neutron diffraction muon spin relaxation

Cite

@article{arxiv.1407.4067,
  title  = {Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution},
  author = {Yuen Yiu and Pietro Bonfà and Samuele Sanna and Roberto De Renzi and Pietro Carretta and Michael A. McGuire and Ashfia Huq and Stephen E. Nagler},
  journal= {arXiv preprint arXiv:1407.4067},
  year   = {2015}
}

Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution

Abstract

Keywords

Cite

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