'top-tier journal' is correct and usable in written English.
You can use it to refer to a journal which is considered to be of high quality or prestige. For example, "This article has been published in a top-tier journal, which makes it highly credible."
With their stress-altered cells, Vacanti and Obokata thought they had made a discovery significant enough to publish in a top-tier journal.
Their goal is to do cutting-edge work that will merit publication in a top-tier journal.
Don't worry so much about publishing in a top-tier journal; just pick one that is suitable.
In total, just 62 of the manuscripts were accepted (6.2%), confirming just how difficult it is to be published in a top-tier journal.
Planning studies carefully and choosing the right journal are among the keys to publishing your translational research in a top-tier journal.
While Barbara was writing her dissertation, the other co-director told her he needed help running some experiments for a project that would be published in a top-tier journal.
Researchers have become accustomed and indifferent to results in top-tier journals that can't be reproduced.
Top-tier journals, such as Science and Nature, have announced new guidelines for the research they publish.
This is a clear trend, as reference lists focus more and more on recent articles in top-tier journals like Nature and Science.
Grant did not think, upon reading that e-mail, I cannot possibly answer in full every such query and still publish so often, and in such top-tier journals.
Grant took three years to get his Ph.D., and in the seven years since, he has published more papers in his field's top-tier journals than colleagues who have won lifetime-achievement awards.
