Index Terms—Displacement damage, radiation effects modeling. There are some inconsistencies in the above paper [1] partly arising from the use of different relativistic parameters in the NIEL calculations. To correct this, the analytical alpha particle NIEL data tabulated in Appendix II should be divided by 1.704, 1.240, and 1.256 for Si, GaAs, and InP, respectively. Also, the data plotted in Fig. 6 is inconsistent with the procedure that is outlined in Appendix I to calculate NIEL using SRIM [2]. The corrected figure, included below, contains an ordinate unit change from MeVcm /g to keV/ m. Note that the calculation outlined in this paper only includes unscreened and nonrelativistic Coulombic interactions. Analytical NIEL calculations including nuclear screening and relativistic effects are described in this issue [3], [4]. We apologize for these errors.

A Reply to the Comment by Sergey K. Tolpygo and A Reply to the Comment by P. Monod, K. Maki and Albenque, F. Rullier.Received 13 June 1995DOI:https://doi.org/10.1103/PhysRevLett.75.3199©1995 American Physical Society

We report the frequency and magnetic-field dependence of the microwave absorption in ErBa2Cu3O(x) for 1.3 K < T < 100 K. At temperatures below about 10 K, there is a huge increase in the absorption at zero field. Surprisingly, this giant effect comes from the electron spin resonance involving the lowest-lying Kramers doublet of the Er3+ ion. The ESR is broad and highly distorted, presumably due to a wide distribution of slowly varying dipolar fields which, in turn, leads to an effective zero field splitting of about 1 K.

Using an electron-spin resonance (ESR) technique at 10 GHz we have determined the temperature dependence of the field-induced magnetization in amorphous FexRu80−xB20 with 60≤x≤65. This concentration range includes a ferromagnet, a spin glass, and several reentrants. The ferromagnet displays typical T3/2 temperature dependence, while all other concentrations display the T dependence characteristic of spin glasses.

Microwave absorption has been used to study the electromagnetic properties of the yttrium-barium-copper-oxide superconductor and other compounds in this phase system. The method can discriminate between superconductivity and metal-insulator and ferroelectric transitions in milligram size samples of powder. The transition that has been reported to occur near 240 K in several physical properties of samples of the high-temperature superconductor YBa2Cu3O7 is shown to be not an intrinsic property of this material but to be associated with impurity phases or interfaces.

We have used electron spin resonance measurements to derive the temperature and frequency dependences of the field-induced magnetization [M(T, f)] and anisotropy field [Han (T)] in a number of amorphous alloys belonging to the series (FepNi1−p)75P16B6Al3. In re-entrant (p >pc, the critical concentration for ferromagnetism) alloys at hi gh frequencies (f = 35 GHz, field ≈ 12 kOe) M reduces as T3/2 at high T and as T below ≈ 40 K, the deviation from T3/2 becoming more marked as p → p+c. For p close to pc, lowering the frequency first causes the T32 term to increase and ultimately ( ≈ 4 GHz) changes the variation of M with T to that discovered previously for concentrated spin glasses, namely M is constant at low T and drops linearly at high temperatures. For the re-entrants, the results are interpreted on the basis of a model which invokes an energy gap in the spin-wave spectrum, introduces a non-zero density of states of the gap energy and takes into consideration a low-q cut-off in the spin-wave integral in thelow-T (≲T) regime.In the concentrated spin glasses [M (0) - M (T)]/ M (0) is well represented by the function [exp (Δ / T) - 1]-1, where Δ has values close to the corresponding Curie-Weiss temperatures θp but much larger than the respective spin glass transition temperatures TSG. The temperature dependence of Han is largely given by the function (1 - T/T∗), where T∗ is equal to the zero-field freezing temperature for the re-entrants and TSG for the spin glasses, respectively.

We report a carbonate coprecipitation technique for preparing Bi1.6Pb0.3Sb0.1Ca2Sr2Cu3O10 samples. X-rays, microwave absorption and magnetic measurements show that the material is nearly single phase with T c≃106 K. The presence of antimony appears to accelerate the formation of -2223 from the -2122.

A systematic study of the relationship between particle dimensions and microwave absorption in micron size powders of superconducting Y1Ba2Cu3O7 reveals that small particles have negligible absorption at T<0.8Tc, and that the transition gets sharper as the grains get bigger. However, when the particles get so large as to incorporate multiple grains, the transition broadens and there is significant absorption down to 0.7 Tc. The temperature dependence in the small (≤10 μm) powders is satisfactorily described by a simple extension of London's theory.

We report a systematic study of the temperature dependences of microwave absorption and low field dc magnetization in powder samples of the superconductor Y1Ba2Cu3O6.9. Both measurements indicate a transition temperature near 90 K. The temperature dependence of the diamagnetic susceptibility, as well as its value at T⪡Tc are close to that of a conventional BCS superconductor.

We present the frequency and concentration dependence of Γ1, the parameter which characterizes the low-temperature increase in the magnetic resonance linewidth, for several reentrant magnets belonging to the alloy series (FepNi1−p)75G25 and (FepNi1−p)80G20. A comparison is made and it is shown that, near the spin-glass-reentrant transition concentration, the low-frequency dependence of Γ1 is dramatically different for these two apparently similar systems.