A novel double-peaked spin-glass susceptibility-temperature response in the ternary alloy Fe69Mn26Cr5 |
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| Authors: | T Datta D Thornberry Edwin R Jones HM Ledbetter |
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| Institution: | Physics and Astronomy Department, University of South Carolina, Columbia, SC 29208, U.S.A.;Fracture and Deformation Division, National Bureau of Standards, Boulder, CO 80303, U.S.A. |
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| Abstract: | We have studied the low-field (B ≦ 10?2 T) d.c. susceptibility χ of the austenitic stainless-steel alloy Fe69Mn26Cr5 as a function of the magnetic field B and temperature T. χ(T) shows structure, strong B dependence, and typical irreversible effects. The range of temperatures studied comprises three distinct regions. In the high-temperature region (300 K ≦ T ≦ 380 K) a blunt peak in the susceptibility is noticed at T2 = 340 K. T2 was not sensitive to thermal cycling. χ(T) displayed a sharp cusp at T1 = 200 K. This peak was sensitive to the thermal history of the sample and was strongly suppressed by B. Between T1 and T2 a shallow valley with some hysteresis was observed. We interpret this behavior to be due to a low-temperature pure spin-glass phase, a high temperature conventional paramagnetic phase, and coexisting antiferromagnetic and spin-glass phases between T1 and T2. |
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