Effect of pressure on thermal expansion of UNiGa

F. Honda; G. Oomi; A. V. Andreev; L. Havela; K. Prokeš; V. Sechovský

doi:10.1016/S0921-4526(97)00389-X

Effect of pressure on thermal expansion of UNiGa

F. Honda, G. Oomi, A. V. Andreev, L. Havela, K. Prokeš, V. Sechovský

Research output: Contribution to journal › Article › peer-review

Abstract

The thermal expansion of single crystalline UNiGa has been measured along the crystallographic axes (a and c) under pressures up to 1.1 GPa. The linear thermal expansion both in the paramagnetic and antiferromagnetic ranges is strongly anisotropic. The antiferromagnetic ordering is accompanied by considerable (10^-4) linear spontaneous magnetostrictions (along the a-and c-axis) of different signs (-0.8 x 10^-4 and 1.8 x 10^-4). The mutual compensation of these two effects causes the volume effect to be rather small (∼10^-5). Two of the four magnetic phase transitions in UNiGa indicated by the expansion anomalies under ambient pressure are suppressed by pressures above 0.5 GPa. Results of our experiments allow to construct a pressure-temperature (p-T) magnetic phase diagram.

Original language	English
Pages (from-to)	109-112
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	239
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-4526(97)00389-X
Publication status	Published - Aug 1 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0921-4526(97)00389-X

Cite this

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title = "Effect of pressure on thermal expansion of UNiGa",

abstract = "The thermal expansion of single crystalline UNiGa has been measured along the crystallographic axes (a and c) under pressures up to 1.1 GPa. The linear thermal expansion both in the paramagnetic and antiferromagnetic ranges is strongly anisotropic. The antiferromagnetic ordering is accompanied by considerable (10-4) linear spontaneous magnetostrictions (along the a-and c-axis) of different signs (-0.8 x 10-4 and 1.8 x 10-4). The mutual compensation of these two effects causes the volume effect to be rather small (∼10-5). Two of the four magnetic phase transitions in UNiGa indicated by the expansion anomalies under ambient pressure are suppressed by pressures above 0.5 GPa. Results of our experiments allow to construct a pressure-temperature (p-T) magnetic phase diagram.",

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T1 - Effect of pressure on thermal expansion of UNiGa

AU - Honda, F.

AU - Oomi, G.

AU - Andreev, A. V.

AU - Havela, L.

AU - Prokeš, K.

AU - Sechovský, V.

PY - 1997/8/1

Y1 - 1997/8/1

N2 - The thermal expansion of single crystalline UNiGa has been measured along the crystallographic axes (a and c) under pressures up to 1.1 GPa. The linear thermal expansion both in the paramagnetic and antiferromagnetic ranges is strongly anisotropic. The antiferromagnetic ordering is accompanied by considerable (10-4) linear spontaneous magnetostrictions (along the a-and c-axis) of different signs (-0.8 x 10-4 and 1.8 x 10-4). The mutual compensation of these two effects causes the volume effect to be rather small (∼10-5). Two of the four magnetic phase transitions in UNiGa indicated by the expansion anomalies under ambient pressure are suppressed by pressures above 0.5 GPa. Results of our experiments allow to construct a pressure-temperature (p-T) magnetic phase diagram.

AB - The thermal expansion of single crystalline UNiGa has been measured along the crystallographic axes (a and c) under pressures up to 1.1 GPa. The linear thermal expansion both in the paramagnetic and antiferromagnetic ranges is strongly anisotropic. The antiferromagnetic ordering is accompanied by considerable (10-4) linear spontaneous magnetostrictions (along the a-and c-axis) of different signs (-0.8 x 10-4 and 1.8 x 10-4). The mutual compensation of these two effects causes the volume effect to be rather small (∼10-5). Two of the four magnetic phase transitions in UNiGa indicated by the expansion anomalies under ambient pressure are suppressed by pressures above 0.5 GPa. Results of our experiments allow to construct a pressure-temperature (p-T) magnetic phase diagram.

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JO - Physica B: Condensed Matter

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Effect of pressure on thermal expansion of UNiGa

Abstract

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