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Magnetic properties of the RMn12-xTx alloys in high magnetic field

Suski W., Belan B., Gilewski A., Mydlarz T., Wochowski K.

Materials Science

2003

Vol. 21, No. 1

107-113

The structure and magnetic properties of the tetragonal ThMn12 - type RMn12-xTx alloys (R=Nd, Sm; T=Co, Ni) have been studied in broad magnetic field ranges (up to 35 T). High pulsed magnetic field is applied at T = 4.2 K with the pulse duration of 10 ms. The NdMn12-xNix system has been investigated additionally in the temperature range extended up to about 750 K. The ternaries exist in, approximately, the 4 => x => 8 composition range. The alloys with x ~4 are frequently paramagnetic in a broad temperature range, whereas for other compositions complicated magnetic properties are observed. The results are discussed in relation to the free-ion values of the Nd and Sm ions .