Laser-wavelength dependence of the picosecond ultrasonic response of a NiFe/NiO/Si structure

被引：9

作者：

Bosco, CAC ^{[1
]}

Azevedo, A ^{[1
]}

Acioli, LH ^{[1
]}

机构：

[1] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.66.125406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultrafast optical excitation and detection of acoustic phonons has been used to analyze ultrathin films composed of NiFe/NiO/Si which are important for applications in magnetic storage and processing. Results are presented on the wavelength dependence of the ultrasonic response of the thin NiO film and bulk Si. Significant changes are observed between detection using the fundamental and the second harmonic of the femtosecond laser as the probe beam. Beatings between low order longitudinal phonons in the NiO layer are observed and measurements of its refractive index and absorption coefficients are performed.

引用

页码：1 / 7

页数：7

共 28 条

[11] Experiments with acoustic solitons in crystalline solids [J].

Hao, HY ;

Maris, HJ .

PHYSICAL REVIEW B, 2001, 64 (06)

[12] Study of phonon dispersion in silicon and germanium at long wavelengths using picosecond ultrasonics [J].

Hao, HY ;

Maris, HJ .

PHYSICAL REVIEW LETTERS, 2000, 84 (24) :5556-5559

[13]

HITOVY I, 1999, SENSOR ACTUAT B-CHEM, V57, P147

[14] Deposition and properties of nickel oxide films produced by DC reactive magnetron sputtering [J].

Hotovy, I ;

Huran, J ;

Janik, J ;

Kobzev, AP .

VACUUM, 1998, 51 (02) :157-160

[15] Phonon confinement in ultrathin nickel films [J].

Melikyan, A ;

Minassian, H .

CHEMICAL PHYSICS LETTERS, 2000, 331 (2-4) :115-118

[16] Picosecond ultrasonics study of metallic multilayers [J].

Perrin, B ;

Bonello, B ;

Jeannet, JC ;

Romatet, E .

PHYSICA B-CONDENSED MATTER, 1996, 219-20 :681-683

[17] OPTICAL PROPERTIES OF NIO AND COO [J].

POWELL, RJ ;

SPICER, WE .

PHYSICAL REVIEW B-SOLID STATE, 1970, 2 (06) :2182-+

[18] Picosecond ultrasonic study of Mo/Si multilayer structures using an alternating-pump technique [J].

Pu, NW ;

Bokor, J ;

Jeong, S ;

Zhao, RA .

APPLIED PHYSICS LETTERS, 1999, 74 (02) :320-322

[19]

RIDLEY BK, 1988, QUANTUM PROCESS SEMI

[20] FEMTOSECOND STUDIES OF NONEQUILIBRIUM ELECTRONIC PROCESSES IN METALS [J].

SCHOENLEIN, RW ;

LIN, WZ ;

FUJIMOTO, JG ;

EESLEY, GL .

PHYSICAL REVIEW LETTERS, 1987, 58 (16) :1680-1683

← 1 2 3 →