M
M. Tovar
Researcher at National University of Cuyo
Publications - 77
Citations - 1843
M. Tovar is an academic researcher from National University of Cuyo. The author has contributed to research in topics: Magnetization & Paramagnetism. The author has an hindex of 21, co-authored 76 publications receiving 1785 citations. Previous affiliations of M. Tovar include Balseiro Institute.
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Journal ArticleDOI
Giant magnetoresistance in fine particle of La0.67Ca0.33MnO3 synthesized at low temperatures
Rodolfo Sánchez,José Rivas,Carlos Vázquez-Vázquez,§ and M. Arturo López-Quintela,M.T. Causa,M. Tovar,S. B. Oseroff +6 more
TL;DR: In this paper, a solgel method was used to obtain monodispersive particles of La0.67Ca0.33MnO3 in the range from 20 to 110 nm at temperatures from 540 to 1000 °C.
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High-temperature spin dynamics in CMR manganites: ESR and magnetization
M.T. Causa,M. Tovar,Alberto Caneiro,Fernando Daniel Prado,G. Ibanez,C.A. Ramos,Alejandro Butera,B. Alascio,Xavier Obradors,S. Piñol,Francisco Rivadulla,Carlos Vázquez-Vázquez,M. A. López-Quintela,José Rivas,Yasuhiro Tokura,S. B. Oseroff +15 more
TL;DR: In this paper, the electron spin resonance (ESR) and dc susceptibility measurements in Mn perovskites up to 1000 K were performed and a single relaxation mechanism related to spin-only interactions was proposed.
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EPR linewidths in La 1-x Ca x MnO 3 : 0<=x<=1
D. L. Huber,G. Alejandro,Alberto Caneiro,M.T. Causa,Fernando Daniel Prado,M. Tovar,S. B. Oseroff +6 more
TL;DR: In this article, the electron paramagnetic resonance linewidth was analyzed in the case of a single ion anisotropy and antisymmetric (Dzialozhinsky-Moriya) exchange with isotropic superexchange.
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Complex magnetic properties of the rare-earth copper oxides, R2CuO4, observed via measurements of the dc and ac magnetization, EPR, microwave magnetoabsorption, and specific heat
S. B. Oseroff,D. Rao,F. Wright,D. C. Vier,Sheldon Schultz,J. D. Thompson,Zachary Fisk,S. W. Cheong,M. F. Hundley,M. Tovar +9 more
TL;DR: These measurements reveal two characteristic transition temperatures associated with a novel complex magnetic behavior, including weak ferromagnetism, two sharp peaks in the low-field dc magnetization, an unusual anisotropy in the EPR resonance field for {ital R}=Gd, and two additional anisotropic microwave absorption modes.
Journal ArticleDOI
Evidence of strong antiferromagnetic coupling between localized and itinerant electrons in ferromagnetic Sr 2 FeMoO 6
M. Tovar,M. T. Causa,Alejandro Butera,José A. Navarro,Benjamín Martínez,Josep Fontcuberta,Mario Cesar Guillermo Passeggi +6 more
TL;DR: In this article, the Curie-Weiss behavior of electron-spin resonance (ESR) measurements in the paramagnetic regime has been analyzed in the presence of a strong magnetic coupling.