Anomalous Magnetism in Eu(Ca)B6

V.V. Glushkov; M.A. Anisimov; A.V. Bogach; S.V. Demishev; N.A. Samarin; A.V. Kuznetsov; A.V. Dukhnenko; A.V. Levchenko; N.Y. Shitsevalova; K. Flachbart; N.E. Sluchanko

doi:10.4028/www.scientific.net/SSP.152-153.307

Paper Titles

Magnetic Properties of Diluted Magnetic Semiconductors Pb_1-xV_xTe
p.291

Ferromagnetism in Diluted Magnetic Semiconductors Pb_1-x-yGe_xCr_yTe
p.295

Antiferromagnetic Ordering of the 3d Ions in Compounds with Ca₃Ga₂Ge₄O₁₄ Structure
p.299

Magnetic Properties of Mn-Doped ZnO Nanowires
p.303

Anomalous Magnetism in Eu(Ca)B₆
p.307

Novel Ferromagnetic Mn-Doped ZnSiAs₂ Chalcopyrite with Curie Point Exceeded Room Temperature
p.311

Influence of Glass Coating Thickness on Magnetoimpedance Ratio in Co-Based Amorphous Microwires
p.317

Minimizing the Effect of Noise in High-Speed Reversal of a Magnetic Dipole
p.321

A Microwave Study of Intrinsic Permeability of Mechanically Activated Powders of Fe-Based Alloys
p.325

HomeSolid State PhenomenaSolid State Phenomena Vols. 152-153Anomalous Magnetism in Eu(Ca)B6

Anomalous Magnetism in Eu(Ca)B₆

Abstract:

The transport and magnetic properties of the Eu1-xCaxB6 (0x0.4) single crystals were studied in the wide ranges of temperatures (1.8-300 K) and magnetic fields (up to 8 T). The experimental data allow to identify a metal-insulator transition (MIT) at the critical Ca concentration xMIT≈0.3, which agrees well with the predictions of double exchange model (V.M. Pereira et al. Phys. Rev. Lett., 93 (2004) 147202). A significant enhancement of magnetoresistive effect is observed below 100K for Eu1-xCaxB6 compounds corresponding to the metallic side of the MIT (xxMIT). The drastic decrease of paramagnetic Curie temperature evaluated from the magnetic and magnetotransport data is discussed in terms of quantum MIT scenario recently proposed for this low carrier density system.