TY - JOUR
T1 - Crossover from fluctuation-driven continuous transitions to first-order transitions
AU - Blankschtein, Daniel
AU - Aharony, Amnon
PY - 1981
Y1 - 1981
N2 - Near a tricritical point of an n-component spin system, fluctuations turn the first-order transition (predicted by the Landau theory) into second order. We show that when this happens, quadratic anisotropies turn the transition first order again. In systems which exhibit fluctuation-driven first-order transitions, increasing anisotropies yield two consecutive tricritical points. These effects are predicted to result from the application of magnetic fields or uniaxial stresses to MnO, BaTiO3, KTaxNb1-xO3 (KTN), TbP, etc.
AB - Near a tricritical point of an n-component spin system, fluctuations turn the first-order transition (predicted by the Landau theory) into second order. We show that when this happens, quadratic anisotropies turn the transition first order again. In systems which exhibit fluctuation-driven first-order transitions, increasing anisotropies yield two consecutive tricritical points. These effects are predicted to result from the application of magnetic fields or uniaxial stresses to MnO, BaTiO3, KTaxNb1-xO3 (KTN), TbP, etc.
UR - http://www.scopus.com/inward/record.url?scp=4244132045&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.47.439
DO - 10.1103/PhysRevLett.47.439
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AN - SCOPUS:4244132045
VL - 47
SP - 439
EP - 442
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 6
ER -