Hydrogen-filled proportional counter operated at low temperatures and its application to CEMS

Fukumura, K.; Nakanishi, A.; Kobayashi, Takayuki

doi:10.1016/0168-583x(94)95305-8

Cited by 28 publications

(11 citation statements)

References 6 publications

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“…For the detection of the conversion electrons, a lowbackground proportional counter filled with H 2 was used at low temperatures. 47 At temperatures higher than 70 K, a 96%He-4%CH 4 gas mixture was used for the measurement. The spectra were measured by a 50 mCi 57 Co(Rh) single line source.…”

Section: Methodsmentioning

confidence: 99%

Magnetic properties of the Fe-MgO interface studied by Mössbauer spectroscopy

et al. 2013

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Thin 57 Fe layers evaporated onto an MgO(100) single-crystal substrate and covered by an evaporated MgO layer were studied by low-temperature conversion electron Mössbauer spectroscopy. The temperature dependence of the spectra indicates superparamagnetic behavior below 8 ML nominal thickness of the Fe layer signaling a cluster-type growth mode. The low-temperature hyperfine fields are consistent with a model that defines two types of metallic Fe atoms: bulklike and interfacial ones. Formation of FeO or (Fe,Mg)O at the interface layer is not observed. The sample with a 4-ML Fe layer when grown over a cleaved MgO substrate shows almost perfect perpendicular magnetization, as locally probed at 15 K by the hyperfine magnetic field, while random magnetization orientation and lower blocking temperature is observed in the case of a polished substrate. The perpendicular anisotropy observed at low temperature is attributed to mechanical stresses arising from the epitaxial relation and the different temperature dilatation of the subsequent layers.

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Section: Methodsmentioning

confidence: 99%

Magnetic properties of the Fe-MgO interface studied by Mössbauer spectroscopy

et al. 2013

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“…For low temperature measurements, the counters were placed inside low temperature cryostates. (CEM) spectra were measured by a low-background small-sized continuous-flow counter, and by a H 2 filled counter for the measurements made at 15 K [20]. Single-line sources of 50 mCi 57 Co in Rh matrix were used.…”

Section: Methodsmentioning

confidence: 99%

Ultrathin Fe layers on Ag (100) surface

et al. 2007

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“…[6]). Mössbauer spectra were measured by means of conversion electron Mössbauer spectroscopy, using a gas-flow counter with He 1%CH 3 3 CH at room temperature and a gas-filled counter with H 2 at 20 K [7]. The size of the magnetic hyperfine field induced at the Sn sites is thought to be roughly proportional to that of the magnetic moments of the surrounding Cr atoms [8].…”

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Discrete Change of Spin-Density-Wave Modulation inCr(100)/SnMultilayers as a Function of Cr Layer Thickness

et al. 2002

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Magnetic structures of epitaxial Cr(001)/Sn multilayers, where monatomic Sn layers are periodically embedded in a Cr(001) film, were studied using neutron diffraction and Mössbauer spectroscopy. It was found that spin-density-wave (SDW) antiferromagnetic structures with the modulation along the perpendicular direction to the film plane are stabilized at low temperatures. The wavelength of the SDW discretely changes as a function of the superlattice period. The enhanced magnetic moments of Cr at the Cr/Sn interfaces are thought to pin the antimode of the SDW modulation at the interface, resulting in the SDW with the modulation harmonic to the superlattice period.

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Hydrogen-filled proportional counter operated at low temperatures and its application to CEMS

Cited by 28 publications

References 6 publications

Magnetic properties of the Fe-MgO interface studied by Mössbauer spectroscopy

Magnetic properties of the Fe-MgO interface studied by Mössbauer spectroscopy

Ultrathin Fe layers on Ag (100) surface

Discrete Change of Spin-Density-Wave Modulation inCr(100)/SnMultilayers as a Function of Cr Layer Thickness

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