Results 11 to 20 of about 711 (177)

Extreme magnetoresistance at high-mobility oxide heterointerfaces with dynamic defect tunability [PDF]

Nature Communications
Magnetic field-induced changes in the electrical resistance of materials reveal insights into the fundamental properties governing their electronic and magnetic behavior. Various classes of magnetoresistance have been realized, including giant, colossal,
D. V. Christensen, T. S. Steegemans, T. D. Pomar, Y. Z. Chen, A. Smith, V. N. Strocov, B. Kalisky, N. Pryds   +7 more
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Colossal magnetoresistance of Nd-doped LaCaMnO3 polycrystalline ceramics [PDF]

Processing and Application of Ceramics, 2021
The cation doped polycrystalline compound La0.5Nd0.15Ca0.35MnO3 has been synthesized by a conventional solid state reaction method. The Rietveld analysis of the powder XRD of the composites reveals an orthorhombic structure with Pbnm space group symmetry.
Rajan Sam, Kumar Arun K.V., Isac Jayakumari   +2 more
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Colossal Magnetoresistance is a Griffiths Singularity [PDF]

Physical Review Letters, 2002
It is now widely accepted that the magnetic transition in doped manganites that show large magnetoresistance is a type of percolation effect. This paper demonstrates that the transition should be viewed in the context of the Griffiths phase that arises when disorder suppresses a magnetic transition.
Salamon, M. B., Lin, P., Chun, S. H.
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Percolation mechanism for colossal magnetoresistance [PDF]

Computational Materials Science, 1998
We argue that colossal magnetoresistance is a critical phenomenon and propose a mechanism to describe it. The mechanism relies on the halfmetallic behavior of the materials showing colossal magnetoresistance, and yields a correlated percolation model that, we argue, captures all qualitative features of colossal magnetoresistance, above as well as below
Bastiaansen, Paul J. M., Knops, Hubert J. F.   +1 more
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Striping of orbital-order with charge-disorder in optimally doped manganites

Nature Communications, 2021
Manganite perovskites display the intriguing property of colossal magnetoresistance (CMR), but only at very specific doping values. Now, a detailed crystallographic analysis of a prototype system reveals a novel type of orbital ordering that coexists ...
Wei-Tin Chen, Chin-Wei Wang, Ching-Chia Cheng, Yu-Chun Chuang, Arkadiy Simonov, Nicholas C. Bristowe, Mark S. Senn   +6 more
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Influence of Mn site doping on electrical resistivity of polycrystalline La1-yAyMn1-xBxO3 (A=Ba, Sr; B=Cu, Cr, Co) Manganites [PDF]

Science of Sintering, 2008
We have the measured electrical resistivity of La1-yBayMn1-xCuxO3 (0.17≤y≤0.30; 0.04≤x≤0.10), La1-ySryMn1-xCrxO3 and La1-ySryMn1-xCoxO3 (0.270≤y≤0.294; 0.02≤x≤0.10) polycrystalline samples in the 25-325 K temperature range. The increase of Mn site doping
Paunović N., Popović Z.V., Cantarero A., Sapina F.   +3 more
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Colossal Magnetoresistance in Manganites as a Multicritical Phenomenon [PDF]

Physical Review Letters, 2003
The colossal magnetoresistance in manganites AMnO_3 is studied from the viewpoint of multicritical phenomena. To understand the complicated interplay of various phases, we study the Ginzburg-Landau theory in terms of both the mean-field approximation and the renormalization-group analysis to compare with the observed phase diagram.
Murakami, Shuichi, Nagaosa, Naoto
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Consecutive topological phase transitions and colossal magnetoresistance in a magnetic topological semimetal

npj Quantum Materials, 2022
The combination of magnetic symmetries and electronic band topology provides a promising route for realizing topologically nontrivial quasiparticles, and the manipulation of magnetic structures may enable the switching between topological phases, with ...
Feng Du, Lin Yang, Zhiyong Nie, Ninghua Wu, Yong Li, Shuaishuai Luo, Ye Chen, Dajun Su, Michael Smidman, Youguo Shi, Chao Cao, Frank Steglich, Yu Song, Huiqiu Yuan   +13 more
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Mixed orbital states and modulated crystal structures in La1−x Ca x MnO3 deduced from synchrotron X-ray diffraction

Communications Physics, 2023
In the model manganese perovskites La1−x Ca x MnO3, several important phenomena have been observed, including ferromagnetic metallic/insulating states, colossal magnetoresistance effects, and charge- and orbital-ordered states.
Michael Pissas, Dimosthenis Stamopoulos, Kosmas Prassides   +2 more
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Influence of Thickness on the Magnetic and Magnetotransport Properties of Epitaxial La_0.7Sr_0.3MnO₃ Films Deposited on STO (0 0 1)

Nanomaterials, 2021
Epitaxial La0.7Sr0.3MnO3 films with different thicknesses (9–90 nm) were deposited on SrTiO3 (0 0 1) substrates by pulsed laser deposition. The films have been investigated with respect to morpho-structural, magnetic, and magneto-transport properties ...
Simona Gabriela Greculeasa, Anda-Elena Stanciu, Aurel Leca, Andrei Kuncser, Luminita Hrib, Cristina Chirila, Iuliana Pasuk, Victor Kuncser   +7 more
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