Magnetic imaging of a supercooling glass transition in a weakly disordered ferromagnet

@article{Wu2006MagneticIO,
  title={Magnetic imaging of a supercooling glass transition in a weakly disordered ferromagnet},
  author={Weida Wu and Casey Israel and Nam Hwi Hur and Soonyong Park and Sang‐Wook Cheong and Alex de Lozanne},
  journal={Nature Materials},
  year={2006},
  volume={5},
  pages={881-886}
}
Spin glasses are founded in the frustration and randomness of microscopic magnetic interactions. They are non-ergodic systems where replica symmetry is broken. Although magnetic glassy behaviour has been observed in many colossal magnetoresistive manganites, there is no consensus that they are spin glasses. Here, an intriguing glass transition in (La,Pr,Ca)MnO3 is imaged using a variable-temperature magnetic force microscope. In contrast to the speculated spin-glass picture, our results show… 
Glass-like recovery of antiferromagnetic spin ordering in a photo-excited manganite Pr0.7Ca0.3MnO3
TLDR
Time-resolved resonant soft x-ray scattering spectroscopy is used to probe the dynamics of antiferromagnetic spin ordering in the manganite Pr0.7Ca0.3MnO3 following ultrafast photo-exitation to reveal a glass-like recovery of the spin ordering and a crossover in the dimensionality of the restoring interaction from quasi-1D at low pump fluence to 3D at high pump fluences.
Coexisting tunable fractions of glassy and equilibrium long-range-order phases in manganites
Antiferromagnetic-insulating (AF-I) and ferromagnetic-metallic (FM-M) phases coexist in various half-doped manganites over a range of temperature and magnetic field, and this is often believed to be
Ferromagnetic domain nucleation and growth in colossal magnetoresistive manganite.
TLDR
By directly observing magnetic domain walls and flux distributions using cryogenic Lorentz microscopy and electron holography, it is demonstrated that an applied magnetic field assists nucleation and growth of an ordered ferromagnetic phase.
Glassy dynamics in magnetization across the first order ferromagnetic to antiferromagnetic transition in Fe0.955Ni0.045Rh
TLDR
In the intermediate temperature regime, the magnetic relaxation can be explained as a combination of both the power law and stretched exponential, which is indicative of glassy dynamics or the arrest of the kinetics of the phase transition.
Nucleation and growth dynamics across the antiferromagnetic to ferromagnetic transition in (Fe0.975Ni0.025)50Rh50: analogy with crystallization
We present the results of ac susceptibility and dc magnetization measurements on polycrystalline (Fe0.975Ni0.025)50Rh50. The sample undergoes a first order antiferromagnetic to ferromagnetic
Elastically driven anisotropic percolation in electronic phase-separated manganites
Complex oxide films are highly anisotropic in the way they conduct electricity, which is due to phase separation. However, the origin of this metal–insulator phase coexistence has been unclear.
Emergent phenomena in manganites under spatial confinement
It is becoming increasingly clear that the exotic properties displayed by correlated electronic materials such as high-Tc superconductivity in cuprates, colossal magnetoresistance (CMR) in
A real space description of magnetic field induced melting in the charge ordered manganites: I. The clean limit
Abstract We study the melting of charge order in the half doped manganites using a model that incorporates double exchange, antiferromagnetic superexchange, and Jahn-Teller coupling between electrons
Direct imaging revealing halved ferromagnetism in tensile-strained LaCoO3 thin films
The enigma of the emergent ferromagnetic state in tensile-strained LaCoO3 thin films remains to be explored because of the lack of a well agreed explanation. The direct magnetic imaging technique
...
...

References

SHOWING 1-10 OF 37 REFERENCES
Percolative phase separation underlies colossal magnetoresistance in mixed-valent manganites
Colossal magnetoresistance—an unusually large change of resistivity observed in certain materials following application of magnetic field—has been extensively researched in ferromagnetic perovskite
Strain-induced metal–insulator phase coexistence in perovskite manganites
TLDR
It is shown that the texturing can be due to the intrinsic complexity of a system with strong coupling between the electronic and elastic degrees of freedom, which leads to local energetically favourable configurations and provides a natural mechanism for the self-organized inhomogeneities over both nanometre and micrometre scales.
Martensitic accommodation strain and the metal-insulator transition in manganites
In this paper, we report polarized optical microscopy and electrical transport studies of manganese oxides that reveal that the charge ordering transition in these compounds exhibits typical
Supercooled liquids and the glass transition
TLDR
Current theoretical knowledge of the manner in which intermolecular forces give rise to complex behaviour in supercooled liquids and glasses is discussed.
Spin Glasses
From a physical point of view, spin glasses, as dilute magnetic alloys, are very interesting systems. They are characterized by such features as exhibiting a new magnetic phase, where magnetic
Complexity in Strongly Correlated Electronic Systems
TLDR
The spontaneous emergence of electronic nanometer-scale structures in transition metal oxides, and the existence of many competing states, are properties often associated with complex matter where nonlinearities dominate, such as soft materials and biological systems.
Competing orders and disorder-induced insulator to metal transition in manganites.
Effects of disorder on the two competing phases, i.e., the ferromagnetic metal and the commensurate charge/lattice ordered insulator, are studied by Monte Carlo simulation. The disorder suppresses
Spin glasses: Experimental facts, theoretical concepts, and open questions
This review summarizes recent developments in the theory of spin glasses, as well as pertinent experimental data. The most characteristic properties of spin glass systems are described, and related
Novel dynamical effects and persistent memory in phase separated manganites.
TLDR
Two novel effects for the manganites are reported, namely, the rejuvenation of the resistivity after aging and a persistent memory of low magnetic fields (<1 T), imprinted in the amount of the FM phase.
Magnetic relaxation in La0.250Pr0.375Ca0.375MnO3 with varying phase separation
We have studied the magnetic relaxation properties of the phase-separated manganite compound La 0 . 2 5 0 Pr 0 . 3 7 5 Ca 0 . 3 7 5 MnO 3 . A series of polycrystalline samples was prepared with
...
...