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Alternative crystal field parameters for rare-earth ions obtained from various techniques: IV. Comparative analysis of crystal field parameters obtained from inelastic neutron scattering and related studies of RE ions (RE=Er3+, Ho3+, Nd3+, Pr3+) in REBa2Cu3O7−δ high-Tc superconductors

“…The notations used in the four related papers by Mirmelstein, Golosova and coworkers [5,[40][41][42] is discussed jointly in this Section. The papers [5,40,41] dealt with both Er and Ho ions, whereas the paper [42] dealt with only Ho ions and is discussed in Section 3.2.…”

“…The papers [5,40,41] dealt with both Er and Ho ions, whereas the paper [42] dealt with only Ho ions and is discussed in Section 3.2. A model of the crystal field generated by a periodic array of charged tapes (PACTs) was developed in [5] to consider charge ordering occurring in the CuO 2 planes due to doping and describe the variation of the CF parameters versus oxygen stoichiometery.…”

“…A model of the crystal field generated by a periodic array of charged tapes (PACTs) was developed in [5] to consider charge ordering occurring in the CuO 2 planes due to doping and describe the variation of the CF parameters versus oxygen stoichiometery. The PACTs model has been used to analyze the CF interaction in REBa 2 Cu 3 O 7Àd (RE = Er, Ho) high-T c copper oxides observed by INS [5,[40][41][42]. The modified Stevens notation, in which the reduced matrix elements (expressed in the original symbols used in [5]) H n = 1, i.e.…”

“…The modified Stevens notation, in which the reduced matrix elements (expressed in the original symbols used in [5]) H n = 1, i.e. B nm = B nm (Stevens)/H n , was adopted in [5,40,41], whereas the Wybourne notation in [42].…”

“…In the preliminary study [40] only the leading CFPs B 2n2m (in meV) for Ho (and Er) compounds derived from the INS spectra and calculated with the PACT model [5] were listed. The CF Hamiltonian was not explicitly given, whereas the CFPs were expressed in the notation:…”