The zero-field mu(+)SR technique is employed to study the magnetic properties of the nonsuperconducting borocarbides Sm1-xLuxNi2B2C (z = 0.0, 0.2) and NdPt1.5Au0.6B2C. Co- herent ordering of the Sm electronic moments appears below T-N = 9.86(3) and 4.15(3) K for the x = 0.0 and 0.2 compositions, respectively. No long range order of the Nd3+ moments is found in NdPt1.5Au0.6B2C down to 80 mK. Freezing of the electronic moments into a spin-glass state occurs at T-f approximate to 1.2 K. A stretched exponential decay of the mu(+) spin polarisation is observed above T-f with the exponent beta smoothly decreasing on approaching T-f from above, reminiscent of the behaviour in other spin glasses.
Magnetic properties of nickel and platinum quaternary borocarbides / Cristofolini, Luigi; A., Lappas; K., Prassides; Vavekis, Buchgeister. - In: HYPERFINE INTERACTIONS. - ISSN 0304-3843. - 104:1(1997), pp. 61-66.
Magnetic properties of nickel and platinum quaternary borocarbides
CRISTOFOLINI, Luigi;
1997-01-01
Abstract
The zero-field mu(+)SR technique is employed to study the magnetic properties of the nonsuperconducting borocarbides Sm1-xLuxNi2B2C (z = 0.0, 0.2) and NdPt1.5Au0.6B2C. Co- herent ordering of the Sm electronic moments appears below T-N = 9.86(3) and 4.15(3) K for the x = 0.0 and 0.2 compositions, respectively. No long range order of the Nd3+ moments is found in NdPt1.5Au0.6B2C down to 80 mK. Freezing of the electronic moments into a spin-glass state occurs at T-f approximate to 1.2 K. A stretched exponential decay of the mu(+) spin polarisation is observed above T-f with the exponent beta smoothly decreasing on approaching T-f from above, reminiscent of the behaviour in other spin glasses.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
