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High resolution spin waves measurements have been carried out in ferromagnetic (F) La(1-x)(Sr,Ca)xMnO3 with x(Sr)=0.15, 0.175, 0.2, 0.3 and x(Ca)=0.3. In all q-directions, close to the zone boundary, the spin wave spectra consist of several energy le
Externí odkaz:
http://arxiv.org/abs/0812.1715
Publikováno v:
Phys. Rev. B76, 014437 (2007).
Neutron elastic, inelastic and high energy x-ray scattering techniques are used to explore the nature of the polaron order and dynamics in La0.7Ca0.3MnO3. Static polaron correlations develop within a narrow temperature regime as the Curie temperature
Externí odkaz:
http://arxiv.org/abs/cond-mat/0701001
The effect of resistive switching in doped manganites being in the ferromagnetic state has been studied using resistive and magneto-optic methods. The visualization of magnetic structure of La0.75Sr0.25MnO3-x single crystals, and its transformation u
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605457
Autor:
Hennion, M., Moussa, F., Lehouelleur, P., Wang, F., Ivanov, A., Mukovskii, Y. M., Shulyatev, D.
We report a study of spin-waves in ferromagnetic La$_{1-x}$Ca$_{x}$MnO$_3$, at concentrations x=0.17 and x=0.2 very close to the metallic transition (x=0.225). Below T$_C$, in the quasi-metallic state (T=150K), nearly q-independent energy levels are
Externí odkaz:
http://arxiv.org/abs/cond-mat/0408611
Autor:
Adams, C. P., Lynn, J. W., Smolyaninova, V. N., Biswas, A., Greene, R. L., Ratcliff II, W., Cheong, S-W., Mukovskii, Y. M., Shulyatev, D. A.
Neutron scattering has been used to study the nature of the ferromagnetic transition in single crystals of La_0.7Ca_0.3MnO_3 and La_0.8Ca_0.2MnO_3, and polycrystalline samples of La_0.67Ca_0.33MnO_3 and La_5/8Ca_3/8MnO_3 where the naturally occurring
Externí odkaz:
http://arxiv.org/abs/cond-mat/0304031
The ferromagnetic and insulating state observed in La$_{1-x}$Ca$_{x}$MnO$_3$, 0.125$<$x$<$0.2, is characterized by structural and magnetic anomalies below T$_C$, similar to those observed in the x$_{Sr}$$\approx$1/8. A neutron scattering study of the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0112159
Autor:
Biotteau, G., Hennion, M., Moussa, F., Pinsard, L., Revcolevschi, A., Mukovskii, Y. M., Shulyatev, D.
We describe the evolution of the static and dynamic spin correlations of La$_{1-x}$Ca$_x$MnO$_3$, for x=0.1, 0.125 and 0.2, where the system evolves from the canted magnetic state towards the insulating ferromagnetic state, approaching the metallic t
Externí odkaz:
http://arxiv.org/abs/cond-mat/0101414
Neutron scattering has been used to study the nature of the ferromagnetic transition in a single crystal of the perovskite La0.7Ca0.3MnO3. Diffuse scattering from lattice polarons develops as the Curie temperature is approached from below, along with
Externí odkaz:
http://arxiv.org/abs/cond-mat/0009132
Cold neutron triple-axis measurements have been used to investigate the nature of the long-wavelength spin dynamics in strongly-doped La$_{1-x}$Sr$_{x}$MnO$_3$ single crystals with $x$=0.2 and 0.3. Both systems behave like isotropic ferromagnets at l
Externí odkaz:
http://arxiv.org/abs/cond-mat/9712191