Dynamics of two-spin cluster in spin glass III. Magnetization process at finite, but low temperature

✍ Scribed by G. Heber; D. Zymierska; H. Beyer

• Publisher: John Wiley and Sons
• Year: 1982
• Tongue: English
• Weight: 546 KB
• Volume: 114
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2221140233

✦ Synopsis

Abstract

Based on the two‐spin cluster model of spin glass, the magnetization process at low T is investigated. The short‐range inter‐cluster interaction is taken into account by excitation waves, treated as free Bosons. They feel, however, additionally a Weiß‐type molecular field of long range. For certain parameter sets in the range T < T~F~ magnetic instabilities are found, as well as metastable branches of m(H, T)‐curves, leading to magnetization jumps, induced by external magnetic field. The phase diagram shows a line of first‐order transitions and a point of a higher‐order transition. Hysteresis and domain patterns are the usual behaviour in this region.