Related Experiment Video
Updated: May 3, 2026
10:23
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
Published on: December 13, 2016
11.3K
Ferromagnetic CaRuO3
Shivendra Tripathi1, Rakesh Rana1, Sanjay Kumar1
1Indian Institute of Science Education and Research (IISER) Bhopal, M.P.-462023, INDIA.
Scientific Reports
|January 28, 2014
Summary
Tensile epitaxial strain induces ferromagnetic order and Fermi-liquid behavior in non-magnetic CaRuO3 films. This strain-induced magnetism is more effective than chemical methods, offering new insights into magnetic material properties.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Calcium ruthenate (CaRuO3) is an isostructural analog of ferromagnetic (FM) strontium ruthenate (SrRuO3), but typically exhibits non-magnetic and non-Fermi-liquid properties.
- Understanding the conditions that induce magnetism in CaRuO3 is crucial for exploring novel electronic and magnetic functionalities.
Purpose of the Study:
- To investigate the possibility of inducing ferromagnetic (FM) order in orthorhombic CaRuO3 using tensile epitaxial strain.
- To correlate structural and magnetic properties under varying strain conditions.
- To examine the associated changes in electronic behavior from non-Fermi liquid to Fermi-liquid states.
Main Methods:
- Epitaxial growth of CaRuO3 thin films on SrTiO3 (100) and LaAlO3 (100) substrates to apply tensile and compressive strains, respectively.
- Structural characterization to determine strain levels.
- Magnetic property measurements, including magnetic moment analysis.
- Hall resistivity measurements to probe electronic transport and distinguish between ordinary and anomalous Hall effects.
Main Results:
- Tensile epitaxial strain successfully induced ferromagnetic (FM) order in CaRuO3 films.
- A direct scaling relationship was established between the FM moment and the applied tensile strain.
- A strain-dependent crossover from non-magnetic to FM behavior was observed, accompanied by a transition from non-Fermi liquid to Fermi-liquid electronic states.
- Tensile-strained films on SrTiO3 (100) showed an anomalous Hall effect, while compressive-strained films on LaAlO3 (100) exhibited only the ordinary Hall effect.
- Tensile strain proved to be a more efficient method for inducing FM order in CaRuO3 compared to chemical substitution.
Conclusions:
- Epitaxial tensile strain is a viable and effective route to induce elusive ferromagnetic order and Fermi-liquid behavior in CaRuO3.
- The observed phenomena align with theoretical predictions regarding strain scaling and magnetic ordering.
- Strain engineering offers a powerful tool for tuning the magnetic and electronic properties of ruthenates.
More Related Videos
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.5K
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
6.6K
Related Concept Videos
01:31Ferromagnetism
2.8K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.8K
01:26Diamagnetism
2.8K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.8K
01:30Magnetism
8.2K
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
8.2K
01:30Paramagnetism
2.4K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.4K
01:15Magnetic Vector Potential
1.8K
In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
1.8K
01:31Magnetic Susceptibility and Permeability
2.9K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
2.9K