Quantum criticality in CaRuO3 - Influence of Ti substitution

被引：5
|
作者：
Baran, A. [1 ]
Zorkovska, A. [2 ]
Kajnakova, M. [3 ,4 ]
Sebek, J. [5 ]
Santava, E. [5 ]
Bradaric, I. [6 ]
Feher, A. [3 ,4 ]
机构：
[1] Tech Univ Kosice, Fac Mfg Technol Seat Presov, Presov 08001, Slovakia
[2] Slovak Acad Sci, Inst Geotech, Kosice 04353, Slovakia
[3] Safarik Univ, Ctr Low Temp Phys, Kosice 04154, Slovakia
[4] Slovak Acad Sci, Kosice 04154, Slovakia
[5] Acad Sci Czech Republic, Inst Phys, Prague 18221, Czech Republic
[6] Univ Belgrade, Vinca Inst Nucl Sci, Condensed Matter Phys Lab, Belgrade 11001, Serbia
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2012年 / 249卷 / 08期
关键词：
magnetism; non-Fermi liquids; phase separation; quantum criticality; ruthenates; FERMI-LIQUID BEHAVIOR; LINEAR TEMPERATURE-DEPENDENCE; LOCALIZED ELECTRON TRANSITION; SPIN FLUCTUATIONS; RUTHENIUM OXIDES; CRITICAL-POINT; PHASE; PEROVSKITE; SRRUO3; FERROMAGNETISM;
D O I：
10.1002/pssb.201147575
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Thermodynamic and transport properties of the CaRu1xTixO3 system with x?=?0, 0.03, 0.07, 0.10, and 0.15 in magnetic field up to 9?T have been studied. The unconventional temperature dependences of magnetic susceptibility, specific heat, and electrical resistivity observed for CaRuO3 are typical for non-Fermi liquids and they support the assumption about the proximity of the system to the quantum critical point. The analysis of the experimental results suggests the electronic phase separation in CaRuO3 into ferromagnetic itinerant regions coexisting with strongly correlated ones. Substitution by titanium seems to push the system towards ferromagnetism, and drives it away from the quantum criticality.
引用
收藏
页码：1607 / 1612
页数：6
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