TY  - JOUR
AU  - Carretta, P
AU  - Mariani, M
AU  - Azzoni, CB
AU  - Mozzati, MC
AU  - Bradarić, Ivica
AU  - Savić, Ilija
AU  - Feher, A
AU  - Sebek, J
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2793
AB  - Nuclear magnetic resonace (NMR), EPR and magnetization measurements in NaxCoO2 for 0.65less than or equal toxless than or equal to0.75 are presented. While the EPR signal arises from Co4+ magnetic moments ordering at T(c)similar or equal to26 K, Co-59 NMR signal originates from cobalt nuclei in metallic regions with no long range magnetic order and characterized by a generalized susceptibility typical of strongly correlated metallic systems. This phase separation in metallic and magnetic insulating regions is argued to occur below T-*(x) (220-270 K). Above T-* an anomalous decrease in the intensity of the EPR signal is observed and associated with the delocalization of the electrons which for T LT T-* were localized on Co4+ d(z)(2) orbitals. It is pointed out that the in-plane antiferromagnetic coupling JT(*) cannot be the driving force for the phase separation.
T2  - Physical Review B: Condensed Matter and Materials Physics
T1  - Mesoscopic phase separation in NaxCoO2 (0.65 LT = x LT = 0.75)
VL  - 70
IS  - 2
DO  - 10.1103/PhysRevB.70.024409
ER  - 

@article{
author = "Carretta, P and Mariani, M and Azzoni, CB and Mozzati, MC and Bradarić, Ivica and Savić, Ilija and Feher, A and Sebek, J",
year = "2004",
abstract = "Nuclear magnetic resonace (NMR), EPR and magnetization measurements in NaxCoO2 for 0.65less than or equal toxless than or equal to0.75 are presented. While the EPR signal arises from Co4+ magnetic moments ordering at T(c)similar or equal to26 K, Co-59 NMR signal originates from cobalt nuclei in metallic regions with no long range magnetic order and characterized by a generalized susceptibility typical of strongly correlated metallic systems. This phase separation in metallic and magnetic insulating regions is argued to occur below T-*(x) (220-270 K). Above T-* an anomalous decrease in the intensity of the EPR signal is observed and associated with the delocalization of the electrons which for T LT T-* were localized on Co4+ d(z)(2) orbitals. It is pointed out that the in-plane antiferromagnetic coupling JT(*) cannot be the driving force for the phase separation.",
journal = "Physical Review B: Condensed Matter and Materials Physics",
title = "Mesoscopic phase separation in NaxCoO2 (0.65 LT = x LT = 0.75)",
volume = "70",
number = "2",
doi = "10.1103/PhysRevB.70.024409"
}

Carretta, P., Mariani, M., Azzoni, C., Mozzati, M., Bradarić, I., Savić, I., Feher, A.,& Sebek, J.. (2004). Mesoscopic phase separation in NaxCoO2 (0.65 LT = x LT = 0.75). in Physical Review B: Condensed Matter and Materials Physics, 70(2).
https://doi.org/10.1103/PhysRevB.70.024409

Carretta P, Mariani M, Azzoni C, Mozzati M, Bradarić I, Savić I, Feher A, Sebek J. Mesoscopic phase separation in NaxCoO2 (0.65 LT = x LT = 0.75). in Physical Review B: Condensed Matter and Materials Physics. 2004;70(2).
doi:10.1103/PhysRevB.70.024409 .

Carretta, P, Mariani, M, Azzoni, CB, Mozzati, MC, Bradarić, Ivica, Savić, Ilija, Feher, A, Sebek, J, "Mesoscopic phase separation in NaxCoO2 (0.65 LT = x LT = 0.75)" in Physical Review B: Condensed Matter and Materials Physics, 70, no. 2 (2004),
https://doi.org/10.1103/PhysRevB.70.024409 . .