Effect of anti-site disorder on magnetism in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>La</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>NiMnO</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math>

Pal, Somnath; Govinda, Sharada; Goyal, Manik; Mukherjee, Soham; Pal, Banabir; Saha, Rana; Sundaresan, A.; Jana, Somnath; Karis, Olof; Freeland, J. W.; Sarma, D. D.

doi:10.1103/physrevb.97.165137

Cited by 72 publications

(75 citation statements)

References 45 publications

(61 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among such materials, La 2 NiMnO 6 , with A=La, B=Ni, and B ′ =Mn, has attracted a great deal of interest due to its rich physics, particularly large dielectric anomalies, magneto-capacitance effect and strong coupling between the magnetic, phononic and electronic degrees of freedom. It is a ferromagnet near room temperature with a Curie temperature of 280 K, [3][4][5][6][7][8][9][10][11] caused by the dominant Ni 2+ -O 2− -Mn 4+ ferromagnetic super-exchange coupling of the ordered structure. Further, a remarkable spin-glass state was found at 70 K due to the anti-site disorder between Ni 2+ and Mn 4+ ions that leads to Mn 4+ -O 2− -Mn 4+ and Ni 2+ -O 2− -Ni 2+ antiferromagnetic couplings.…”

Section: Introductionmentioning

confidence: 99%

Peculiar magnetic states in the double perovskiteNd2NiMnO6

et al. 2019

Self Cite

View full text Add to dashboard Cite

We present magnetic measurements on Nd 2 NiMnO 6 which exhibits a well-known insulating paramagnetic state to an insulating ferromagnetic state transition when cooled below 200 K. Beyond this basic fact, there is a great deal of diversity in the reported magnetic properties and interpretation of specific anomalies observed in the magnetic data of this compound below the Curie temperature. We address specifically two anomalies discussed in the past, namely a spin-glass like behaviour observed in some samples near 100 K and a downturn in the magnetization with a lowering of the temperature below approximately 50 K. We show for the first time that the application of an increasing magnetic field can systematically change the low temperature behaviour to make the downturn in the magnetization into an upturn. With the help of first principle calculations and extensive simulations along with our experimental observations, we provide a microscopic understanding of all magnetic properties observed in this interesting system to point out that the glassiness around 100 K is absent in well-ordered samples and that the low temperature magnetic anomaly below 50 K is a consequence of a ferromagnetic coupling of the Nd spin-moments with the spin of the Ni-Mn ordered sublattice without giving rise to any ordering of the Nd sub-lattice that remains paramagnetic, contrary to earlier claims. We explain this counter-intuitive interpretation of a ferromagnetic coupling of Nd spins with Ni-Mn spin giving rise to a decrease in the total magnetic moment by noting the less than half-filled 4f occupation of Nd that ensures orbital and spin moments of Nd to be opposite to each other due to the spin-orbit coupling. Since the ground state total magnetic moment of Nd has a contribution from the orbital moment, that is larger than the spin moment, the total moment of Nd is indeed pointing in a direction opposite to the direction of spin moments of the Ni-Mn sublattice as a consequence of the ferromagnetic exchange coupling between Nd and Ni-Mn spins.

show abstract

Section: Introductionmentioning

confidence: 99%

Peculiar magnetic states in the double perovskiteNd2NiMnO6

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…3b shows the high field (H = 800 kA/m) M(T) behavior. As observed earlier, the magnetization decreases at low temperatures, even in such relatively high fields [8]. Using the relation S ∼ dM/dT × 0 H, the magnetic entropy change for 0 H = 1 T was estimated from this data [32].…”

Section: Resultsmentioning

confidence: 93%

“…The sharpness and magnitude of the anomaly near 100 K possibly reflects the amount of antisite disorder ( [5,6]. The downturn of the magnetization below 50 K is on the other hand related to the 4f magnetic moments of the Nd 3+ ions which are coupled antiferromagneticaly to the 3d moments of Mn/Ni [7,8]. Fig.…”

Section: Resultsmentioning

confidence: 96%

“…of the high-temperature ferromagnetic transition at about 195 K [2,7]. The degree of the B ′ /B ′′ cationic ordering strongly affects the magnetic properties of these perovskites [8]. In the perfectly ordered monoclinic structure (s.g. P2 1 ∕n ), the B ′ and B ′′ cations are arranged alternately in the 2c and 2d Wyckoff positions.…”

Section: Introductionmentioning

confidence: 99%

“…In the perfectly ordered monoclinic structure (s.g. P2 1 ∕n ), the B ′ and B ′′ cations are arranged alternately in the 2c and 2d Wyckoff positions. However, experimentally it has been found that, for many perovskites, the B ′ and B ′′ atoms get interchanged resulting in the formation of anti-site disorder [8]. The presence of anti-site disorder results in antiferromagnetic coupling due to super-exchange interactions between Ni 2+ -O 2− -Ni 2+ and Mn 4+ -O 2− -Mn 4+ ions, which causes magnetic frustration [2].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the structural and magnetic properties of the double perovskite $$\hbox {Nd}_{2}\hbox {NiMnO}_{6}$$

Cedervall

Иванов

Lewin

et al. 2019

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

The structural, electronic and magnetic properties of phase pure and stoichiometric samples of the double perovskite Nd 2 NiMnO 6 have been investigated with a combination of X-ray and neutron diffraction, X-ray photoelectron spectroscopy and magnetometry. It is found that the monoclinic space group P2 1 ∕n best describes the crystal structure of Nd 2 NiMnO 6. Photoectron spectroscopy revels a mixed valence of the transition metal sites where Ni has 3+/2+ oxidation states and Mn has 3+/4+. The compound orders ferromagnetically at ∼195 K. The magnetic structure was determined from the refinement of the neutron diffraction data. The results suggests that the B-site magnetic moments align along the crystallographic a-direction.

show abstract

Aqueous Chemical Solution Deposition of Functional Double Perovskite Epitaxial Thin Films

Wang

Frontera

Herrero‐Martín

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

Double perovskite structure (A 2 BB'O 6 )o xidese xhibit ab readth of multifunctionalp roperties with ah uge potential range of applicationsi nf ields as diverse as spintronics, magneto-optic devices,o rc atalysis, and most of these applications requiret he use of thin films and heterostructures. Chemical solution deposition techniques are appearing as av ery promising methodology to achieve epitaxial oxide thin films combining high performance with high throughput and low cost. In addition, the physical properties of these materials are strongly dependent on the ordered arrangemento fc ations in the double perovskite structure.Thus, promoting spontaneous cationic ordering has become ar elevant issue. In this work, our recent achievements by using polymer-assisted deposition( PAD) of environmentally friendly,w ater-based solutions for the growth of epitaxial ferromagnetic insulating double perovskite La 2 CoMnO 6 and La 2 NiMnO 6 thin films on SrTiO 3 and LaAlO 3 single-crystal substratesa re presented. It is shown that the particularc rystallization and growth process conditions of PAD( very slow rate, close to thermodynamic equilibrium conditions) promote high crystallinity and quality of the films, as well as favors spontaneousB -site cationic ordering.

show abstract

Effect of anti-site disorder on magnetism in La2NiMnO6

Cited by 72 publications

References 45 publications

Peculiar magnetic states in the double perovskiteNd2NiMnO6

Peculiar magnetic states in the double perovskiteNd2NiMnO6

On the structural and magnetic properties of the double perovskite $$\hbox {Nd}_{2}\hbox {NiMnO}_{6}$$

Aqueous Chemical Solution Deposition of Functional Double Perovskite Epitaxial Thin Films

Contact Info

Product

Resources

About