Acoustic signals - Field-induced strain - Magnetic field-induced strain - Small amplitude - Start temperature - Strain response - Temperature dependence - Twin boundaries;
D O I:
10.1063/1.2824895
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
A small amplitude acoustic signal was applied to a Ni-Mn-Ga single crystal. The effect of the acoustic signal in enhancing the magnetic-field-induced strain was measured as a function of temperature over the range of 1-35 degrees C below the austenite-start temperature. Strain output was found to decrease with decreasing temperature as a result of lowered twin-boundary mobility. The combination of a piezoelectric drive with the magnetic drive yields an improvement in strain response for all temperatures investigated; however, the piezoenhanced, field-induced strain is maximized at 12.5 degrees C, where partial derivative epsilon/partial derivative T is maximum. (c) 2008 American Institute of Physics.
机构:
Univ Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, BrazilUniv Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, Brazil
Mendonca, A. A.
Jurado, J. F.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Nacl Colombia, Dept Fis & Quim, Lab Propiedades Term Dielect Compositos, Manizales 127, ColombiaUniv Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, Brazil
Jurado, J. F.
Stuard, S. J.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, BrazilUniv Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, Brazil
Stuard, S. J.
Silva, L. E. L.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, BrazilUniv Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, Brazil
Silva, L. E. L.
Eslava, G. G.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, BrazilUniv Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, Brazil
Eslava, G. G.
Cohen, L. F.
论文数: 0引用数: 0
h-index: 0
机构:
Imperial Coll London, Blackett Lab, Prince Consort Rd, London SW7 2BZ, EnglandUniv Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, Brazil
Cohen, L. F.
Ghivelder, L.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, BrazilUniv Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, Brazil
Ghivelder, L.
Gomes, A. M.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, BrazilUniv Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, Brazil