The low field static susceptibility of the spin glass Au<sub>0.96</sub>Fe<sub>0.04</sub>

Guy, C N

doi:10.1088/0305-4608/5/12/005

Cited by 101 publications

(13 citation statements)

References 6 publications

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“…The magnetization for T < Tf is not exactly known. An approximate result will be given in (69). The nonlinear susceptibility z z ( T ) diverges according to (41) a t T,.…”

Section: Fl-0mentioning

confidence: 99%

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Spin glasses (I)

Fischer

1983

Physica Status Solidi (b)

232

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“…The magnetization for T < Tf is not exactly known. An approximate result will be given in (69). The nonlinear susceptibility z z ( T ) diverges according to (41) a t T,.…”

Section: Fl-0mentioning

confidence: 99%

“…5a. 5 b shows, for comparison, experimental data of Guy [69] on Au-4 a t % Fe for the magnetization in a field of 10 Oe. The full line is the magnetization after less than 1 min and shows a fairly sharp cusp (see Fig.…”

Section: Ac(t)/k W ; C~( T / T~)~mentioning

confidence: 99%

Spin glasses (I)

Fischer

1983

Physica Status Solidi (b)

232

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“…We present for the first time a systematic study of the magnetic moment in thin spin-glass films in the thickness range from 500 to 10 nm during a field-cooling from 295 to 2 K in a field of 6 T. We chose to cool the samples down in a large magnetic field to avoid time effects of the magnetization which occur when measuring the magnetization after a zero-field cooling [20,21]. These time effects are similar to the decay of the remanent magnetization in time and it is nowadays widely accepted that the field-cooled magnetization (rather than the zero-field cooled) represents the equilibrium magnetization of a spin glass [20 -22].…”

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confidence: 99%

Size Effect in the Spin Glass Magnetization of Thin AuFe Films as Studied by Polarized Neutron Reflectometry

et al. 2008

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We used polarized neutron reflectometry to determine the temperature dependence of the magnetization of thin AuFe films with 3% Fe concentration. We performed the measurements in a large magnetic field of 6 T in a temperature range from 295 to 2 K. For the films in the thickness range from 500 to 20 nm we observed a Brillouin-type behavior from 295 K down to 50 K and a constant magnetization of about 0.9 micro(B) per Fe atom below 30 K. However, for the 10 nm thick film we observed a Brillouin-type behavior down to 20 K and a constant magnetization of about 1.3 micro(B) per Fe atom below 20 K. These experiments are the first to show a finite-size effect in the magnetization of single spin-glass films in large magnetic fields. Furthermore, the ability to measure the deviation from the paramagnetic behavior enables us to prove the existence of the spin-glass state where other methods relying on a cusp-type behavior fail.

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“…3 with a pronounced cusp at 10 K which can be taken to define T f in our thin-film sample analagous to the cusp in the magnetic susceptibility of bulk AuFe samples. The existence of a cusp in high magnetic fields is surprising in light of magnetization measurements on bulk Au 96 Fe 4 samples [7] where the cusp nearly disappeared in a field of only 1 mT. For comparison a Brillouin function with 2:8m B per Fe atom is plotted in Fig.…”

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confidence: 99%