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Irreversibility, remanence, and Griffiths phase in Sm0.1Ca0.9MnO3 nanoparticles
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10.1063/1.4811445
/content/aip/journal/jap/113/23/10.1063/1.4811445
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/23/10.1063/1.4811445

Figures

Image of FIG. 1.
FIG. 1.

(a)–(c) Temperature dependence of zero field cooled (open symbols) and field cooled (solid symbols) magnetization of SCMO25 and SCMO60 NPs recorded in various magnetic fields.

Image of FIG. 2.
FIG. 2.

(a), (b) The inverse of the real part (χ′) of ac-susceptibility measured at 10 kHz. Dashed lines show fits to theCurie-Weiss law. Solid lines are the best fits of the expression 1/χ′ ∝ ( −  ). (c) Shows the inverse of the real part of ac-susceptibility of SCMO25 measured at 10 kHz and the temperature dependence of / = 1/χ measured at 200 Oe and 15 kOe. (d) Shows the inverse of the real part of ac-susceptibility of SCMO60 measured at 10 kHz and the temperature dependence of / = 1/χ measured at 15 kOe. Insets to (a), (b) show temperature dependence of real (χ′) and to (c), (d) imaginary (χ″) component of ac-susceptibility measured during heating, at ac magnetic field of 10 Oe and at different frequencies.

Image of FIG. 3.
FIG. 3.

(a) Time evolution of magnetization measured in  = 10 Oe, after waiting time  = 100, 1000, and 10 000 s. (b) Time dependence of the magnetic viscosity () = (1/)d()/d(ln), measured at 40 K, after waiting time  = 100, 1000, and 10 000 s, presented in semilogarithmic plot.

Image of FIG. 4.
FIG. 4.

(a) Time variation of the TRM magnetization of SCMO25 NPs after FC at  = 10 kOe recorded at temperatures of 10, 30, 60, and 90 K. (b) Time variation of the IRM magnetization of SCMO25 NPs after an application of  = 10 kOe, as recorded at temperatures of 10, 30, 60, and 90 K. (c) Time variation of the TRM magnetization of SCMO60 NPs after FC at  = 10 kOe recorded at temperatures of 10, 30, 60, and 90 K. (d) Time variation of the IRM magnetization of SCMO60 NPs after an application of  = 10 kOe, as recorded at temperatures of 10, 30, 60, and 90 K.

Image of FIG. 5.
FIG. 5.

The temperature dependence of TRM and IRM of SCMO25 sample measured at application of two magnetic fields 10 and 40 kOe.

Image of FIG. 6.
FIG. 6.

Field dependence of TRM and IRM for SCMO25 and SCMO60 NPs at 10 K.

Tables

Generic image for table
Table I.

Values of parameters , χ, and obtained by fitting the equation () =  log(), with in seconds, to the experimental data for SCMO25 NPs at various temperatures. The total number of fitted data points was equal to 1940.

Generic image for table
Table II.

Values of parameters , , χ, and obtained by fitting the equation () =  , with in seconds, to the experimental data for SCMO25 NPs at various temperatures. The total number of fitted data points was equal to 1940.

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/content/aip/journal/jap/113/23/10.1063/1.4811445
2013-06-20
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Irreversibility, remanence, and Griffiths phase in Sm0.1Ca0.9MnO3 nanoparticles
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/23/10.1063/1.4811445
10.1063/1.4811445
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