21 citations · 52 across the 7 of their papers we have counts for
5 papers · 1 filter
Low temperature Terahertz Spectroscopy of LaFeO, PrFeO, ErFeO, and LuFeO: Quasimagnon resonances and ground multiplet transitions
Nestor E. Massa, Leire del Campo, Vinh Ta Puoc +2
We report on zone center THz excitations of non-Jahn Teller LaFeO, PrFeO, ErFeO, and LuFeO distorted perovskites under external magnetic fields up 7 T. Low temperat…
Identification of spin wave resonances and crystal field transitions in simple chromites RCrO3 (R=Pr, Sm, Er) at ultralow temperatures in the THz spectral region
Néstor E. Massa, Karsten Holldack, Rodolphe Sopracase +4
We report on THz absorption spectroscopy combined with high magnetic fields of polycrystalline RCrO3 (R= Pr, Sm, Er) aiming understanding spin wave resonances at their low temperat…
Phonons and Hybrid Modes in the High and Low Temperature Far Infrared Dynamics of Hexagonal TmMnO3
Néstor E. Massa, Leire del Campo, Domingos De Sousa Meneses +3
We report on TmMnO3 far infrared emissivity and reflectivity spectra from 1910 K to 4 K. At the highest temperature the number of infrared bands is lower than that predicted for ce…
Paramagnetic Collective Electronic Mode and Low Temperature Hybrid Modes in the Far Infrared Dynamics of Orthorhombic NdMnO3
Néstor E. Massa. Leire del Campo, Domingos De Sousa Meneses, Patrick Echegut +2
We report on far- and mid-infrared reflectivity of NdMnO3 from 4 K to 300K. Two main features are distinguished in the infrared spectra: active phonons in agreement with the expect…
Collective Phase-like Mode and the Role of Lattice Distortions at TN~TC in RMn2O5 (R= Pr, Sm, Gd, Tb, Bi)
Néstor E. Massa, Ali F. García-Flores, Domingos De Sousa Meneses +5
We report on electronic collective excitations in RMn2O5 (R= Pr, Sm, Gd, Tb) showing condensation starting at and below TN\simTC\sim40-50 K. Its origin is understood as partial del…