Ultra-High Magnetic Field Effect on the Structural Phase Transition in (Pb, Ge)Te

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  • Ultra High Magnetic Field Effect on the

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Magnetic field effects on the structural phase transition in p-Pb1−xGexTe (x=0.01) and n-Pb1−xGexTe (x=0.008) have been investigated by infrared magneto-transmission measurements in the megagauss range using the single-turn coil technique. We have found that the transition temperature Tc increases by 14 K by the application of magnetic fields of 90 T parallel to the [111] direction in p-type samples whose Tc at 0 T is 34 K. Similar dependence has been observed in n-type samples. These results not only provide a support to the previous work by Takaoka and Murase in the low field range below 7 T but also show that the magnetic field effect on the phase transition is even enhanced in the ultra-high magnetic field range without any saturation. We have estimated the critical field of the possible structural phase transition induced by magnetic fields in PbTe.

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