Double metamagnetic transition in Sr4Ru3O10

被引：26
作者：
Carleschi, E. [1 ]
Doyle, B. P. [1 ]
Fittipaldi, R. [2 ,3 ]
Granata, V. [2 ,3 ]
Strydom, A. M. [4 ]
Cuoco, M. [2 ,3 ]
Vecchione, A. [2 ,3 ]
机构：
[1] Univ Johannesburg, Dept Phys, ZA-2006 Auckland Pk, South Africa
[2] CNR SPIN Salerno, I-84084 Fisciano, SA, Italy
[3] Univ Salerno, Dept Phys, I-84084 Fisciano, SA, Italy
[4] Univ Johannesburg, Dept Phys, Highly Correlated Matter Res Grp, ZA-2006 Auckland Pk, South Africa
来源：
PHYSICAL REVIEW B | 2014年 / 90卷 / 20期
关键词：
MAGNETIC-PROPERTIES; RUTHENATE SR3RU2O7; SINGLE-CRYSTALS; HIGH-PRESSURE; SR2RUO4; SUPERCONDUCTIVITY; SYSTEM; GROWTH; FIELDS;
D O I：
10.1103/PhysRevB.90.205120
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report a magnetization study down to 1.7 K for the trilayered ruthenate Sr4Ru3O10 for magnetic fields applied within the ab plane. Our measurements reveal that the metamagnetic jump appearing in the isothermal magnetization curves below T-M = 68 K is actually composed of two consecutive metamagnetic transitions, where the increase in the magnetization due to the second transition is roughly one third of the overall metamagnetic jump. We show that the metamagnetic critical fields for these two transitions increase as the temperature decreases, and that their difference has a weak temperature dependence that opens up in the proximity of the critical region near T-M. We discuss the origin of this double metamagnetic transition being due to either the ordering of the Ru 4d magnetic moments in the two inequivalent crystallographic Ru sites or to the presence of two van Hove singularities in the near-Fermi-level density of states.
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页数：9
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