Coherent Ferromagnetic Precipitate and Anomalies in the Heat Conduction and Thermopower of Mn_{2-x}Cr_{x}Sb Single Crystals

• Authors: A. Kattwinkel , E. Kraus , Ch. Kleeberg , T. Groń , K. Bärner
• Languages of publication: EN

Abstracts

EN

The heat diffusivity D, the electrical resistivity ρ and the thermoelectric power S of tetragonal Mn_{2-x}Cr_{x}Sb single crystals with 0.02 < x < 0.12 have been measured in the temperature range of 90 K < T < 350 K and along different crystal axes. The heat conductivity κ and σ = 1/ρ are anisotropic along the crystal axes a, c with a ratio of 2:1. κ(T) , ρ(T) and S(T) show anomalies at the spin reorientation temperature T_{Rm} of the matrix (M) Mn_{2-x}Cr_{x}Sb, but also at that of the coherent ferromagnetic precipitate (P) Mn_{1.037}Cr_{0.11}Sb, T_{R}_{p} which is assigned to variations in the spin dependent scattering at the M /P interfaces via changes in the relative orientation of the magnetization vectors of matrix and precipitate (spin valve effect).

Keywords

EN

75.30.Kz; 72.15.Eb; 72.15.Jf

Discipline

• 72.15.Jf: Thermoelectric and thermomagnetic effects
• 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)
• 72.15.Eb: Electrical and thermal conduction in crystalline metals and alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1998
• Volume: 93
• Issue: 5-6
• Pages: 745-762

Dates

published

1998-05

received

1997-11-11

(unknown)

1998-03-17

Contributors

author

A. Kattwinkel

• 4. Phys. Institut der Universität Göttingen, Bunsenstr. 13-15, 37073 Göttingen, Germany

author

E. Kraus

• 4. Phys. Institut der Universität Göttingen, Bunsenstr. 13-15, 37073 Göttingen, Germany

author

Ch. Kleeberg

• 4. Phys. Institut der Universität Göttingen, Bunsenstr. 13-15, 37073 Göttingen, Germany

author

T. Groń

• 4. Phys. Institut der Universität Göttingen, Bunsenstr. 13-15, 37073 Göttingen, Germany

author

K. Bärner

• 4. Phys. Institut der Universität Göttingen, Bunsenstr. 13-15, 37073 Göttingen, Germany

Identifiers

DOI

10.12693/APhysPolA.93.745