Tuning the competing phases of bilayer ruthenate Ca3Ru2O7 via dilute Mn impurities and magnetic field

被引:9
|
作者
Zhu, M. [1 ]
Peng, J. [2 ]
Tian, W. [3 ]
Hong, T. [3 ]
Mao, Z. Q. [4 ]
Ke, X. [1 ]
机构
[1] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[2] Nanjing Univ, Sch Phys, Collaborat Innovat Ctr Adv Microstruct, Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[3] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA
[4] Tulane Univ, Dept Phys & Engn Phys, New Orleans, LA 70118 USA
基金
中国国家自然科学基金; 美国国家科学基金会;
关键词
SUPERCONDUCTIVITY; TRANSITION; CA2RUO4; PHYSICS; METAL;
D O I
10.1103/PhysRevB.95.144426
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have systematically investigated the evolution of the magnetic structure of the bilayer ruthenate Ca-3(Ru1-xMnx)(2)O-7 induced uponMndoping. For 0 < x <= 0.03, thematerials exhibit the same spin structure as that of the parent compound at low temperature, while an incommensurate cycloidal magnetic structure emerges at T slightly above the metal-insulator transition (MIT) temperature (T-MIT). In contrast, for x >= 0.04 the ground state becomes a G-type antiferromagnetic Mott insulator. Furthermore, we have observed magnetic-field-induced transitions in Ca-3(Ru0.96Mn0.04)(2)O-7, which is positioned at the phase boundary. Below T-MIT, the magnetic transition is accompanied by a structural transition, as well as a dramatic change in the electronic properties from a Mott insulator to a localized phase. On the contrary, an incommensurate-to-commensurate spin structure transition is observed for T-MIT < T < T-ICM. Our results suggest strong competing magnetic tendencies in this bilayer ruthenate system that are very susceptible to 3d transition-metal substitution and magnetic field.
引用
收藏
页数:8
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