Thermal conductivity of nano-grained SrTiO3 thin films

被引：54

作者：

Foley, Brian M. ^{[1
]}

Brown-Shaklee, Harlan J. ^{[2
]}

Duda, John C. ^{[1
,2
]}

Cheaito, Ramez ^{[1
]}

Gibbons, Brady J. ^{[3
]}

Medlin, Doug ^{[4
]}

Ihlefeld, Jon F. ^{[2
]}

Hopkins, Patrick E. ^{[1
]}

机构：

[1] Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22904 USA

[2] Sandia Natl Labs, Albuquerque, NM 87185 USA

[3] Oregon State Univ, Sch Mech Ind & Mfg Engn, Corvallis, OR 97331 USA

[4] Sandia Natl Labs, Livermore, CA 94550 USA

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 23期

基金：

美国国家科学基金会;

关键词：

PICOSECOND LIGHT-PULSES; THERMOELECTRIC-MATERIALS; GENERATION; BATIO3; HEAT;

D O I：

10.1063/1.4769448

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We measure the thermal conductivities of nano-grained strontium titanate (ng-SrTiO3) films deposited on sapphire substrates via time-domain thermoreflectance. The 170 nm thick oxide films of varying grain-size were prepared from a chemical solution deposition process. We find that the thermal conductivity of ng-SrTiO3 decreases with decreasing average grain size and attribute this to increased phonon scattering at grain boundaries. Our data are well described by a model that accounts for the spectral nature of anharmonic Umklapp scattering along with grain boundary scattering and scattering due to the film thickness. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769448]

引用

页数：4

共 42 条

[1]

[Anonymous], 2003, E11296 ASTM INT, V03.01

[2] Permittivity scaling in Ba1-xSrxTiO3 thin films and ceramics [J].

Ayguen, Seymen M. ;

Ihlefeld, Jon F. ;

Borland, William J. ;

Maria, Jon-Paul .

JOURNAL OF APPLIED PHYSICS, 2011, 109 (03)

[3] Cooling, heating, generating power, and recovering waste heat with thermoelectric systems [J].

Bell, Lon E. .

SCIENCE, 2008, 321 (5895) :1457-1461

[4] Processing Technologies for High-Permittivity Thin Films in Capacitor Applications [J].

Brennecka, Geoff L. ;

Ihlefeld, Jon F. ;

Maria, Jon-Paul ;

Tuttle, Bruce A. ;

Clem, Paul G. .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2010, 93 (12) :3935-3954

[5] Calculation of various physics constants in heterogenous substances I Dielectricity constants and conductivity of mixed bodies from isotropic substances [J].

Bruggeman, DAG .

ANNALEN DER PHYSIK, 1935, 24 (07) :636-664

[6] Analysis of heat flow in layered structures for time-domain thermoreflectance [J].

Cahill, DG .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2004, 75 (12) :5119-5122

[7] Thermometry and thermal transport in micro/nanoscale solid-state devices and structures [J].

Cahill, DG ;

Goodson, KE ;

Majumdar, A .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2002, 124 (02) :223-241

[8] Role of phonon dispersion in lattice thermal conductivity modeling [J].

Chung, JD ;

McGaughey, AJH ;

Kaviany, M .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2004, 126 (03) :376-380

[9] Thermal conductivity and sound velocities of hydrogen-silsesquioxane low-k dielectrics -: art. no. 094205 [J].

Costescu, RM ;

Bullen, AJ ;

Matamis, G ;

O'Hara, KE ;

Cahill, DG .

PHYSICAL REVIEW B, 2002, 65 (09) :942051-942056

[10] LATTICE DYNAMICS + PHASE TRANSITIONS OF STRONTIUM TITANATE [J].

COWLEY, RA .

PHYSICAL REVIEW, 1964, 134 (4A) :A981-+

← 1 2 3 4 5 →