Field-induced transition in the paramagnetic state of(Sm0.65Sr0.35

Field-Induced Magnetic Order in Frustrated TbBaCo4O7Single Crystals

“…In frames of such scenario magnetization jumps observed in TbBaCo 4 O 7 may be described as a transition from small to large clusters. Similar magnetic field-induced transitions in paramagnetic state were observed for the first time in Sm 0.65 Sr 0.35 MnO 3 manganites [14]. These observations confirm that proposed mechanism of magnetization jumps is realistic and corroborate unconventional character of the ground state.…”

Tunable spin reorientation transition and magnetocaloric effect in Sm0.7−xLaxSr0.3MnO3 series

“…11,12,29,30,31 Borges et al 18 interpreted that the cusp is due to increase of coercive field with lowering temperature. However, the coercive field of x= 0.6 sample is only 120 Oe even at 10 K, which indicates that the origin of the low temperature anomaly is not due to increase in coercive field.…”

ESR investigations on Ca perovskite

“…In a broad temperature range, close to the Curie temperature, two resonance lines, one assigned to the magnetic phase and the other to the paramagnetic phase are noticed (see Figure 2). The coexistence of ferromagnetic and paramagnetic domains, in a temperature range close to Curie temperature was discussed by Borges and collaborators [11]. The resonance spectra in the paramagnetic phase (see for example in Figure 2 the spectrum recorded at T = 261 K) consist of a narrow line, slightly asymmetric, localized near the g=2.00 value, ascribed to a cluster including both Mn4 + and Mn3 + ions [7][8][9][10].…”

“…The g factor, that is proportional to the resonance field, characterize the evolution of a magnetic moment carrying a spin S in an external magnetic field. It is closed to 2.000 for an uncoupled free electron spin and it is sensitive to spin orbit coupling and local magnetic fields [11]. The high value of the g factor in the ferromagnetic phase [11] reflects the presence of such local magnetic field.…”

“…It is closed to 2.000 for an uncoupled free electron spin and it is sensitive to spin orbit coupling and local magnetic fields [11]. The high value of the g factor in the ferromagnetic phase [11] reflects the presence of such local magnetic field. The resonance spectrum is independent of the orientation of the sample relative to the external magnetic field.…”