code for Schottky diode..

************************************************** ***************
.MODEL BAS70 D(IS=3N N=1.06 RS=29 XTI=1.8 EG=.68
+ CJO=1.55P M=.29 VJ=.36 FC=.5 BV=70 IBV=100n TT=25P)
* ISR=2.5n NR=1k IKF=5m
* for 27C reverse current simulation use: GMIN=.5e-9
* 17.12.1993 SIEMENS PD1 KURTH
************************************************** ***************

I like the models from Infineon a lot. They include the parasitics, so the model usually is best suited if you aer working in higher frequencies.

Take a look at the BAT15 website:

http://www.infineon.com/cms/en/produ...12ab6eb6a41d8c

http://www.infineon.com/dgdl/BAT15_0...17d02b304a12ad

Search 1n5819, most times it is already installed. Read the datasheer so you can see if it's suitable for your application

Here you can find a lot of models for many devices:
LTspiceIV-library Library Listing Expanded

thank you.. :)