Anisotropic magnetization and sign change of dynamic susceptibility in Na0.85CoO2 single crystal
| dc.creator | Rhyee, J. S. | |
| dc.creator | Peng, J. B. | |
| dc.creator | Lin, C. T. | |
| dc.creator | Lee, S. M. | |
| dc.date | 2008-04-29 | |
| dc.date.accessioned | 2026-07-07T09:35:49Z | |
| dc.date.available | 2026-07-07T09:35:49Z | |
| dc.description | The DC and AC magnetic susceptibilities of Na0.85CoO2 single crystals were measured for the different crystal orientations of H//(ab)- and H//(c)-axis. The DC-magnetic susceptibility for H//(c)-direction exhibited the antiferromagnetic transition at TN= 22 K. The thermal hysteresis between the zero-field-cooled (ZFC) and the field-cooled (FC) magnetization below TN and the large frustration parameter indicated the spin frustration along the (c)-axis. For an applied magnetic field in H//(ab)-plane, the DC magnetic susceptibility exhibited the logarithmic divergent behavior at low temperatures (T < 6.8 K). This could be understood by the impurity spin effect, dressed by the spin fluctuation. From the AC magnetic susceptibility measurements, the real part of the AC-susceptibility for H//(ab) exhibited the spin glass-like behavior at low temperatures (T < 4 K). Remarkably, for an applied AC magnetic field with H//(c)-axis, the sign of the AC magnetic susceptibility changed from a positive to a negative value with increasing AC magnetic field frequency (f > 3 kHz) at low temperatures (T > 7 K). We interpret the sign change of AC magnetic susceptibility along the (c)-axis in terms of the sudden sign reversal of the phase difference from in-phase to out-of-phase response with an applied AC magnetic field in the AC-susceptibility phase space. | |
| dc.description | will be published in the Physical Review B | |
| dc.identifier | https://arxiv.org/abs/0804.4532 | |
| dc.identifier | http://arxiv.org/abs/0804.4532 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/159956 | |
| dc.subject | Materials Science | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Anisotropic magnetization and sign change of dynamic susceptibility in Na0.85CoO2 single crystal | |
| dc.type | text |