Suppression of ferromagnetism in CeSi_1.81 under temperature and pressure

Details Suppression of ferromagnetism in CeSi_1.81 under temperature and pressure Suppression of ferromagnetism in CeSi_1.81 under temperature and pressure

2006-04-20

arxiv.org/abs/cond-mat/0604470v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 9 figures, to be published in Physical Review B

Scientific paper

10.1103/PhysRevB.73.214413

We have studied the pressure dependence of the magnetization of single crystalline CeSi_1.81. At ambient pressure ferromagnetism develops below T_C = 9.5 Below ~ 5 K an additional shoulder in low-field hysteresis loops and a metamagnetic crossover around 4 T suggest the appearance of an additional magnetic modulation to the ferromagnetic state. The suppression of the magnetic order in CeSi_1.81 as function of temperature at ambient pressure and as function of pressure at low temperature are in remarkable qualitative agreement. The continuous suppression of the ordered moment at p ~ 13.1 kbar suggests the existence of a ferromagnetic quantum critical point in this material.

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