Observation of enhanced magnetic anisotropy in PLD YIG thin film on GGG (1 1 1) substrate

Biswanath Bhoi, N. Venkataramani, Shiva Prasad, R. P.R.C. Aiyar, Gulshan Kumar, I. Samajdar, M. Kostylev

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Magnetic properties and FMR of pulsed laser deposited Y 3 Fe 5 O 12 (YIG) thin film on Gd 3 Ga 5 O 12 (1 1 1) substrate have been investigated in the temperature range 4.2 ≤ T ≤ 300 K. The effective saturation magnetization (4πM eff ), obtained from Ferromagnetic Resonance at room temperature, is found to be 2600 G, which is higher than SQUID measured 4πM S value of 1770 G. This implies that the value of 4πM eff can only be accounted by considering a negative anisotropy field (H U ) of around 830 Oe at room temperature. Such an anisotropy is attributed to a compressive stress (−1.70 × 10 10 dyne/cm 2 ) induced in the film closer to the film-air interface. The presence of this stress in YIG film was confirmed using multiple {hkl} stress measurements with grazing incidence X-ray diffraction performed at different depth of penetration on the YIG film.

Original languageEnglish
Pages (from-to)191-195
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume483
DOIs
Publication statusPublished - 1 Aug 2019

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