78 citations · 229 across the 17 of their papers we have counts for
17 papers
Spin-phonon interactions revisited: Far-infrared emission, Raman scattering, and high-resolution x-ray diffraction at the Néel temperature in LaFeO3
Néstor E. Massa, Javier Gainza, Aurélien Canizares +2
We report on the structural evolution, spin phonon interactions, and magnetoelastic effects in bulk LaFeO3 perovskite across its antiferromagnetic transition. We found that while t…
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…
h-ErMnO3 absorbance, reflectivity and, emissivity in the THz to mid-infrared from 2 K to 1700 K: carrier screening, Fröhlich resonance, small polarons, and bipolarons
Néstor E. Massa, Leire del Campo, Karsten Holldack +4
We report the temperature dependent THz to mid-infrared response of hexagonal-ErMnO3 using absorption, reflectivity, and emissivity techniques from 2 K to 1700 K. At low temperatur…
Far- and Mid-infrared Emission and Reflectivity of Orthorhombic and Cubic ErMnO3: polarons and bipolarons
Néstor E. Massa, Leire del Campo, Karsten Holldack +4
We report on the high-temperature evolution of far- and mid- infrared reflectivity and emissivity spectra of ambient orthorhombic ErMnO3 from 12 K to sample decomposition above 180…
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…
Temperature and high-pressure dependent X-ray absorption of SmNiO3 at the Ni K- and Sm L3- edges
Néstor E. Massa, Aline Y. Ramos, Helio C. N. Tolentino +3
We report on XANES and EXAFS measurements of SmNiO3 from 20 K to 600 K and up to 38 GPa at the Ni K- and Sm L3- edges. A multiple component pre- Ni K-edge tail is understood origin…