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Resistive and magnetoresistive properties of compacted CrO2 powders with different types of intergranular dielectric layers
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10.1063/1.4770508
/content/aip/journal/ltp/38/12/10.1063/1.4770508
http://aip.metastore.ingenta.com/content/aip/journal/ltp/38/12/10.1063/1.4770508

Figures

Image of FIG. 1.
FIG. 1.

Transmission electron micrograph showing CrO2 powder with acicular particles. This powder was used to prepare samples 1–3.

Image of FIG. 2.
FIG. 2.

Magnetization hysteresis curves in sample 3 at T = 5.1 K

Image of FIG. 3.
FIG. 3.

Temperature dependence of the specific resistance in the investigated pressed CrO2 samples. Numbering of the curves corresponds to the sample numbers.

Image of FIG. 4.
FIG. 4.

MR hysteresis curves in sample 4 at T, K: 4.17 (a) and 20.43 (b). The inserts show the behavior of MR in low magnetic fields. Arrows indicate the direction of magnetic field sweeps. A vertical arrow in the insert corresponding to T = 4.17 K indicates the field Hp at which the maximal value of resistance was observed.

Image of FIG. 5.
FIG. 5.

MR hysteresis curves in sample 2 at three different values of temperature T, K: 4.4 (a), 10 (b), and 20 (c). Arrows indicate the direction of magnetic field sweeps.

Image of FIG. 6.
FIG. 6.

Temperature dependence of the field Hp (corresponding to the peak in positive MR) and the coercive force Hc in sample 3.

Image of FIG. 7.
FIG. 7.

Temperature dependence of MR in samples 2, 3 (in magnetic field of 1.5 T) and sample 4 (in magnetic field of 1.2 T).

Image of FIG. 8.
FIG. 8.

MR hysteresis curves at 4.4 K in sample 1 (△, ▲) and sample 2 (□, ▪). Arrows indicate the direction of magnetic field sweeps.

Tables

Generic image for table
Table I.

Characteristics of the investigated pressed CrO2 powders.

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/content/aip/journal/ltp/38/12/10.1063/1.4770508
2012-12-27
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Resistive and magnetoresistive properties of compacted CrO2 powders with different types of intergranular dielectric layers
http://aip.metastore.ingenta.com/content/aip/journal/ltp/38/12/10.1063/1.4770508
10.1063/1.4770508
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