A magnetocaloric study on the series of 3d-metal chromites ACr2O4 where A = Mn, Fe, Co, Ni, Cu and Zn

  title={A magnetocaloric study on the series of 3d-metal chromites ACr2O4 where A = Mn, Fe, Co, Ni, Cu and Zn},
  author={Anzar Ali and Yogesh Singh},
  journal={Journal of Magnetism and Magnetic Materials},
  • Anzar Ali, Y. Singh
  • Published 30 November 2019
  • Materials Science
  • Journal of Magnetism and Magnetic Materials
5 Citations

Figures and Tables from this paper

Antiferromagnetism, spin-glass state, H–T phase diagram, and inverse magnetocaloric effect in Co2RuO4

Investigations of the temperature, magnetic field, frequency and frequency dependence of the ac-magnetic susceptibilities and dc-magnetization covering the temperature range T = 2 K-400 K and H up to 90 kOe show that Co2RuO4 exhibits an antiferromagnetic (AFM) transition at T N ∼ 15.2 K and the observed time-dependence of M(t) is supportive of the spin-glass state.

Magnetocaloric effect and critical behavior of Ni1−xMnxCr2O4 (x = 0, 0.10, and 0.50) compounds

Single-phase polycrystalline samples of Ni1−xMnxCr2O4 (x = 0.0, 0.10, and 0.50) were prepared by the sol–gel route, and their structural, magnetic, and magnetocaloric properties and critical behavior



Colossal magnetoresistance in Cr-based chalcogenide spinels

Manganese oxides with a perovskite structure1 exhibit a transition between a paramagnetic insulating phase and a ferromagnetic metal phase. Associated with this transition is an effect known as

A giant magnetocaloric effect with a tunable temperature transition close to room temperature in Na-deficient La0.8Na0.2-x□xMnO3 manganites.

The ability to tune the temperature transition close to room temperature is revealed to be possible by changing the sodium-deficiency content as well, which underlines that the proposed oxide material has substantial advantages for magnetic refrigeration.

Magnetically ordered and disordered sublattices in geometrically frustrated Ni chromite

The magnetic order/disorder of the Cr-moments in the antiferromagnetic (AF) state of the ferrimagnet NiCr2O4 is reinvestigated by neutron powder diffraction to clarify the observation of reduced Cr

Magnetodielectric coupling in frustrated spin systems: the spinels MCr2O4 (M = Mn, Co and Ni)

The magnetodieletric coupling of polycrystalline samples of the spinels MCr(2)O(4) (M = Mn, Co and Ni) can be explained by spin-orbit coupling and the dielectric response in an applied magnetic field scales with the square of the magnetization for all three samples.

Magnetocaloric effects from an interplay of magnetic sublattices in Nd2NiMnO6

  • Anzar AliG. Sharma Y. Singh
  • Materials Science
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2019
It is argued that this simple understanding of the experimental observations in terms of two antiferromagnetically coupled sublattices allows these results to be useful across a broader class of magnetocaloric materials.

Relaxor ferroelectricity and colossal magnetocapacitive coupling in ferromagnetic CdCr2S4

Measurements on a simple cubic spinel compound with unusual, and potentially useful, magnetic and electric properties show ferromagnetic order coexisting with relaxor ferroelectricity, and the magnetocapacitive coupling reaches colossal values, approaching 500 per cent.

FeCr2O4 and CoCr2O4 spinels: Multiferroicity in the collinear magnetic state?

Dielectric permittivity (ɛ′) and electrical polarization (P) have been measured as a function of temperature for two polycrystalline ACr2O4 spinels (A = Fe and Co). Anomalies on the ɛ′(T) curves are

Giant magneto-elastic coupling in multiferroic hexagonal manganites

This paper shows, using a combination of diffraction techniques, that the hexagonal manganites RMnO3 undergo an isostructural transition with exceptionally large atomic displacements: two orders of magnitude larger than those seen in any other magnetic material, resulting in an unusually strong magneto-elastic coupling.