Suppression of ferromagnetism in CeSi_1.81 under temperature and pressure

2; 2); (2) Forschungszentrum Karlsruhe; 3); (3) Physik Department E21; (4) Leibniz-Institut fur Festkorper- und Werkstoffforschung Dresden); C. Pfleiderer (1; D. Souptel (4); G. Behr (4) ((1) Physikalisches Institut; H. v. Lohneysen (1

arxiv: cond-mat/0604470 · v1 · submitted 2006-04-20 · ❄️ cond-mat.str-el

Suppression of ferromagnetism in CeSi₁.81 under temperature and pressure

S. Drotziger (1) , C. Pfleiderer (1 , 2 , 3) , M. Uhlarz (1) , H. v. Lohneysen (1 , 2) , D. Souptel (4)

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W. Loser (4) G. Behr (4) ((1) Physikalisches Institut Universitat Karlsruhe (2) Forschungszentrum Karlsruhe Institut fur Festkorperphysik (3) Physik Department E21 Technische Universitat Munchen (4) Leibniz-Institut fur Festkorper- und Werkstoffforschung Dresden)

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classification ❄️ cond-mat.str-el

keywords pressurecesisuppressiontemperatureadditionalambientbelowferromagnetic

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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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Suppression of ferromagnetism in CeSi₁.81 under temperature and pressure

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